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probability og 11 10

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probability og 11 10

by Maggie12 » Wed Jan 21, 2009 5:22 pm
Q1

Raffle tickets numered consecutively from 101 through 350 are placed in a box. what is teh probability that a ticket selected at random willhave a number with a hundred digit of 2

A. 2/5

B 2/7

C. 33/83

D. 99/250

E. 100/249

this question is from Og 11 q 10

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by awesomeusername » Wed Jan 21, 2009 5:59 pm
There are 99 numbers included in 101-199 inclusive
There are 100 numbers included in 200-299 inclusive
There are 51 numbers included in 300-350 inclusive

There are a total of 250 numbers

The only numbers that have a 2 in the hundreds place is the range of numbers from 200-299. There are 100 of these as noted above.

Then P("2 in the hundreds place") is 100/250 = 2/5
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