exam Maths Puzzle Numerical Ability

APR for Monthly Paymnet Plans
9.5% 10% 10.5%

# of payments 30

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exam Other Question

18 out of 20 customers make a purchase. If three customers are selected randomly one at a time, what is the probability that all will make a purchase?

Please help.
write an expression for each quantity.

the number of gallons in 21 quarts

the number of gallons in q quarts