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if you are picking a number from 0 to 20, what is the probability that you will pick a number greater than 14?

Sagot :

Answer:

You could calculate it directly, by counting the numbers that are multiples of 2 or 3, but more useful is learning this rule:

P(A or B) = P(A) + P(B) -P(A and B).

This lets you calculate:

P(even or multiple of 3) = P(even) + P(multiple of 3) -P(even and multiple of 3)

= 1/2 + 6/20 -3/20 =13/20.

Note that being a multiple of 2 and 3 just means being a multiple of 6.

Step-by-step explanation:

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