5,385 Answered Questions for the topic probability

07/29/21

Ina box contain 21 marbles: 6 white, 7 black, and 8 yellow. Randomly pick out one marble and return it back to the box for 8 times. What is the possibility to get exact 4 white and 3 black marbles?

The answer has four decimal place.
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Probability Statistics

07/28/21

What is the probability?
A life insurance salesman finds that, of all the sales he makes, 70% are to people who already own policies. He also finds that, of all contacts for which no sale is made, 50% already own life... more
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Probability Statistics

07/28/21

What are the events?
A dean has found that 62% of entering freshmen and 78% of community college transfers eventually graduate. Of all entering students, 73% are entering freshmen and the remainder are community... more
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Probability College Algebra

07/27/21

Probabillity Question

Two people are selected at random from eleven men and ten women. Find the probability that the first is a woman and the second is a man.
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Probability Statistics

07/27/21

Probabibility and combinatorics
Of 100 patients with a certain disease, 10 were chosen at random to undergo a drug treatment that increases the cure rate from 50% for those not given the treatment to 75% for those given the drug... more
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Probability Statistics

07/27/21

Probability of an event
A jury of 12 members is to be selected from a panel consisting of 8 men and 8 women. a. How many different jury selections are possible?b. If the choice is made randomly, what is the probability... more
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Probability Math

07/27/21

Matthew flips 2 coins, what is the probability that he will get
a.  only one tail.                                                                      b.  two heads.
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Probability Math

07/27/21

There are six cards and each card shows one of the letters in the word C A N A D A. If you choose randomly, what is the probability of choosing a card with the letter A?

There are six cards and each card shows one of the letters in the word  C A N A D A. If you choose randomly, what is the probability of choosing a card with the letter A? 
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Probability Math

07/26/21

What is the probability of tossing a coin 5 times and each time getting heads
What is the probability of tossing a coin 5 times and each time getting heads
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Probability Math

07/26/21

What is the probability of drawing a black face card in a standard deck of 52 playing cards?

what is the probability of drawing a black face card in a standard deck of 52 playing cards? 
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Probability Math

07/26/21

A ten sided die is numbered from one to ten. What is the probability of rolling a four on 3 consecutive rolls
A ten sided die is numbered from one to ten. What is the probability of rolling a four on 3 consecutive rolls
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Probability Math

07/26/21

The letters that make the name BRIANNA are put on cards and placed in a box. State the probability of each event below if one letter is selected at random from the word BRIANNA
an “N”  a vowel  an “R” 
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Probability Percentage

07/25/21

Failure of drugs during development is due to many reasons, such as Poor biopharmaceutical properties =40%, Lack of efficacy =30% and Toxicity =45%. So what is the percentage of drugs that fail
Failure of drugs during development is due to many reasons, such as Poor biopharmaceutical properties =40%, Lack of efficacy =30% and Toxicity =45%. So what is the percentage of drugs that fail
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Probability Math Sat

07/22/21

9 students have to form a line. In how many different ways can they be arranged?
__?__ arrangements
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Probability Math Calculus

07/22/21

How many different numbers are possible?
A personal identification number consists of 3 letters followed by 3 digits. The letters X,Y, and Z are not used and the last digit cannot be 0 or 9.__?__ different numbers
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Probability Precalculus

07/22/21

What is the probability that all three prizes go to women?
Party guests are each given a number at the door when they come in and during the party 3 numbers will be chosen at random from a hat to win door prizes. There are 20 people at the party of which... more
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Probability

07/20/21

find the odds in favor of rolling the sum of 6 when rolling a pair of dice
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Probability

07/20/21

find the probability of selecting two red cards when two cards are drawn without replacement from a standard deck of cards
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Probability

07/20/21

200 people apply for 3 jobs. 60 are women. If 3 persons are selected randomly, what is probability 2 are women

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Probability

07/19/21

Probability Race Horse
A horse race has 10 entries and one person owns 4 of those horses. Assuming that there are no ties, what is the probability that those four horses finish first, second, third, and fourth?
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Probability Statistics

07/18/21

Probability of an event
The grades of a freshman college class, obtained after the first year of college, were analyzed. Seventy percent of the students in the top quarter of the college class had graduated in the upper... more
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Probability Statistics

07/15/21

Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three times
Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three timesand let X equal the number of heads. Find the probability distribution of X and then find its mean and... more
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Probability Statistics

07/15/21

Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three times
Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three timesand let X equal the number of heads. Find the probability distribution of X and then find its mean and... more
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Probability

07/14/21

a random veriable x has pdf is fX(x)=5/8(1-x^4) where -1<_x<_1.... find P[-1/2<_X<_3/4]........(<_) means greater then and equal to
Kindly solve this problem. Than you
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Probability

07/14/21

a fair coin is tossed 8 times. what is the probability that no of heads not greater then 2.
Kindly solve this problem. Thank You
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