CTET 2 Math and Science Sep 2014 Paper

Question : 37 of 120

Marks: +1, -0

What is the probability that a randomly selected factor from positive factors of 72 is less than 11 ?

Solution:

The positive factor of 72

=1,2,3,4,6,8,9,12,18,24,36,72

Total no. of factor n(s) = 12
Factor that is less than 11

=1,2,3,4,5,6,7,8,9

Total factor less than

11=n(E)=7

No. of probability

=\;\;{n(E)}/{n(s)}=\;\;{7}/{12}

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