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3 years ago

Sara has 20 sweets.

Mathematics

2 answers:

sdas [7]3 years ago

4 0

17/29 + 6/29 + 4/29
= 27/30
1 - 27/29 = 2/29 = 0.069

Ber [7]3 years ago

3 0

Simple probability question.

The probability that the 2 sweets will not be the same = 1 - probability of same 2 sweets.

There are 3 possible outcomes where the two sweets will be the same. If she had 2 Liquorice or 2 mint or 2 humbug.

P(2 Liquorice) = 12/20 * 11/19
P(2 Mint) = 5/20 *4/19
P(2 Humbug) = 3/20 * 2/19

All of those added together will give you the probability of her getting 2 of the same time of sweet. 

You the take that answer and subtract it from 1.

I hope that helps.

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The number of phone calls that Actuary Ben receives each day has a Poisson distribution with mean 0.1 during each weekday and mean 0.2 each day during the weekend.

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