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Ann [662]
3 years ago
15

If a person is randomly selected, find the probability that his or her birthday is not in may.

Mathematics
1 answer:
Lerok [7]3 years ago
5 0
Supposing 30 days in the month of May (which is not always same in every year),we have,
S= Sample Space
n(S)=total days in a year=365 days
n(E)=no of favourable events
= no of days in the month of May=30 days
Then the probability is of favourable events is,
P(E)=n(E)/n(S)=30/365=6/73
Now,the probability that the birthday is not in May is,
P'(E) =1-6/73=67/73 ANS!!!
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Answer:

360,360

Step-by-step explanation:

This is called a Permutation with repetition, we want to know in how many ways we can arrange a certain ammount of elements (normal permutation), BUT some of those elements are identical.

The formula we use in these cases is:

\frac{n!}{n1!*n2!*...*ni!}

where n is the total amount of elements, n1 is the amount of repeated elements of the type 1, n2 is the amount of repeated elements of the type 2, ni is the amount of repeated elements of the type i.

In this particular case we have:

n=13 (total amount of shirts)

n1=2 (small shirts)

n2=3 (medium shirts)

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then the amount of orders the shirts can be sold at (arranged) is:

\frac{13!}{2!*3!*6!*2!}=360,360

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