In a shop there are 20 customers, 10 of whom will make a purchase. if three customers are selected, one at a time, at random, what is the probability that all will make a purchase?

What is m + (5n) (9-p) - 6-r2

Create a real world context for ratios

What is a coupon on a bond similar to?

Solve the following for the indicated variable C = 2πr for r circumference of a circle

Two numbers are in the ratio 2:3. If the sum of the numbers is 15, then the numbers are:

A shopper buys a 12 - pound bag of oranges for $18.75. What is the unit price?

Harry kept a record of how far he ran each day last week Distance (in miles) Monday 4.5 Tuesday 3.9 Wednesday 4.25 Thursday 3.75 Friday 4.2 On which day did Harry run the greatest number of miles?

Matthew collects purple and red marbles. he has 320 marbles and 65% of them are purple. How many red marbles does he have?

Multiply the complex numbers. (5+1i) (-3+2i)

Joe owns and apple orchard with 20 apple trees. Each year he will plant 7 more. Write and explicit formula for the number of apple trees in the orchard.