Sample of 3 items is selected at random from a box containing 20 items of which 4 aredefective. find the expected number of defective items in the sample.

Haala buys 13 identical shirts and 22 identical ties for 363.01 ... The cost of a shirt is 15.35. Find the cost of a tie

What is 6 - (-3) 6 - (-3)

A hemispherical tank is filled with water and has a diameter of 21 feet. If water weighs 62.4 pounds per cubic foot, what is the total weight of the water in a full tank, to the nearest pound?

Why does it not matter what letter or symbol is used to find an unknown number?

Write a story problem to represent 1/2 divided by 3

Solve the system: 6x=25y+1 5x-16y=-4

On the muffler's vacation to florida they drove 180 miles in 3 hours for stopping for lunch. after lunch they drove 120 miles in 2 hours before stopping for gas. are these rates are equivalent? explain your reasoning

My Mustache is 20% longer than last week. Last week mustache was 140 cm long. How much did mustache grow this week?

You have a 32-foot fence around a square garden. There are 4equal sections. You paint 1/3 of one section of the fence. What fraction of the fence did you paint?

In a certain city it was recorded that 7 3/5 inches of rain fell over a 24 hour period. How Much rain fell per hour on average?