A street vendor sells $25.70 worth of pretzels on Friday, $32.30 on Saturday, and $31.80 on Sunday. He spends a fourth of the money over the weekend.How much money does he have left?
Answer(s): D
Add the sales amounts together: $25.70 + $32.30 + $31.80 = $89.80. Then multiply the total sales by 3⁄4 to determine how much money he has left: $89.80 × 0.75 = $67.35.
A recruit has $30.00. He saw some camouflage socks for $3.95 a pair. How many pairs of socks can he buy?
Answer(s): B
Divide $30.00 by $3.95. The whole number is the number of pairs of socks he could buy: $30.00 ÷ $3.95 = 7.59 or 7 pairs of socks.
A crate containing a puppy weighs 60 pounds, 5 ounces. The puppy weighs 43 pounds, 7 ounces. How much does the crate alone weigh?
16 ounces make a pound. Subtract 43 pounds, 7 ounces (the weight of the puppy) from 59 pounds, 21 ounces (the weight of the crate). 59 pounds, 21 ounces is the same as 60 pounds, 5 ounces, but converting an additional pound to ounces makes the subtraction possible.59 pounds, 21 ounces – 43 pounds, 7 ounces =16 pounds, 14 ounces
In a manufacturing plant that produces new computers, a 0.15 probability exists that a computer will be defective.If five computers are manufactured, what’s the probability that all of them will be defective?
The probability that all five computers will be defective is 0.15 × 0.15 × 0.15 × 0.15 × 0.15 = 0.0000759 (round up to 0.000076)
A house contains one 12-foot × 14-foot bedroom, one 12-foot × 10-foot bedroom, and one 8-foot × 12-foot bedroom.What’s the total amount of carpeting needed to carpet all three bedrooms?
Find the area of each bedroom and add them together: 12 × 14 = 168; 12 × 10 = 120; 8 × 12 = 96. 168 + 120 + 96 = 384 square feet. Then, because 3 feet make up a yard, divide the total area in square feet by 3 to determine the number of square yards needed: 384 ÷ 3 = 128 square yards.
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