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1.Nine apples are randomly taken from a set of 4 red apples,5 green apples and 6 yellow apples.How many possibilities that 2 apples from all colours and minimum 4 yellow apples are taken? A...

If 6 percent of the bill was a fee for over-usage during the weekdays and 2 percent of the bill was a fee for over-usage on the weekend, what amount of the bill was attributable to over-usage for...

If a, b, and c are all positive integers and if a²x² + cx + b² is the square of an integer for all integer values of x, what is the value of c in terms of a and b?    Please...

When Lucy drives to her job, her average speed is 30 miles per hour. When she drives home from work by the same route, traffic is lighter, so her average speed is 45 miles per hour.    I...

An animal shelter uses 18 cups of food to feed 20 dogs and 12 cats one meal each.   I tried this, but I got 6. 6 is a wrong answer. Please help. Thank you!!

Rivets can be cooled before they are put in place, thus when they reach equilibrium temperature they are more firmly fixed in place.   If the volume expansion of iron is 35.0 X 10-6...

an investor invested a total amount of \$1900 in two mutual funds. One fund earned a 7% profit while the other earned a 5% profit. If the total amount of profit was \$117, how much was invested in each...

A laboratory technician needs to make a 32 liter batch of 40% acid solution. How can the technician combine a batch of acid solution that is pure acid with another that is 20% to get the desired concentration...