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Hindi
14.Probability
medium

$3$ પત્રો $3$ પરબિડીયામાં યાર્દચ્છિક રીતે મૂકો. માત્ર એક પત્ર સાચા પરબિડીયામાં જઈ શકવાની સંભાવના કેટલી થાય ?

A

$1/2$

B

$1/3$

C

$1/6$

D

$2/3$

Solution

Ways the letter can be put into envelopes $=3 !=6$

Probability that all are delivered to the correct address $=\frac{1}{6}$

No. of ways one letter is delivered to the correct address $=3$ ways

Probability One is delivered to the correct address $=\frac{3}{6}=\frac{1}{2}$

Standard 11
Mathematics

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