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Posts Tagged ‘probability’

Problem of the Week – Week 8

In Numeracy Problem of the Week, QR on January 25, 2010 at 3:50 pm

Problem of the Week

Puzzle 8

Suppose you have 16 blue socks and 22 black socks in a drawer. If you reach into the drawer without looking at the socks, what is the smallest number of socks you must take from the drawer to be assured of getting one pair of blue socks?

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Problem of the Week – Week 6

In Numeracy Problem of the Week, QR on January 11, 2010 at 7:11 pm

Problem of the Week

Puzzle 6

If a number is chosen at random from the numbers 1 to 20 inclusive, what is the probability that:
a) a prime number will be picked?

b) an even number will be picked?

c) a single digit number will be picked?