CBSE Class 12 Math 2020 Delhi Set 2 Solved Paper

Question : 3 of 11

Marks: +1, -0

A number is chosen randomly from numbers 1 to 60 . The probability that the chosen number is multiple of 2 or 5 is

Solution:

Let

{\A}=

Numbers multiple of 2
and

B=

Numbers multiple of 5

∴ \;\; P(A ∪ B)\;=P(A)+P(B)-P(A ∩ B)

\;=\;{30}/{60}+\;{12}/{60}-\;{6}/{60}

\;=\;{36}/{60}=\;{3}/{5}

∴

Option (b) is correct.

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