A number is chosen at random from 1 to 25 find the probability of selecting a number less than seven

Question

Give ma a right answer

 

Answer 1

P(A) = n(A)/n(S)

• P(A) = the probability of event A occurring
• n(A) = the number of ways event A can occur
• n(S) = the total possible outcomes

 

Here event A is picking a number less than 7.  There are 6 ways to pick a number less than 7 (pick 1, 2, 3, 4, 5, or 6), so n(A) = 6.  There are 25 total numbers so n(S) = 25.  The probability of picking a number less than 7 (P(<7)) then is:

 

P(<7) = 6/25

Answer 2

There are 6 numbers smaller than 7, so the probability of picking a number less than 7 (out of 25 numbers total) is 6/25.