Q. 15 B4.3( 6 Votes )

A die is thrown twice. What is the probability that

5 will come up at least once?

[Hint : Throwing a die twice and throwing two dice simultaneously are treated as the same experiment ].

Answer :

If a dice thrown ‘n’ times then total number of outcome = 6n

Dice is thrown 2 times then total outcomes = 62


Dice is thrown 2 times then total outcomes = 36


Favourable outcomes where 5 will come up at least once.


(1,5)(2,5)(3,5)(4,5)(5,5)(5,1)(5,2)(5,3)(5,4)(5,6)(6,5).


Favourable events = 11


Total events = 36


P(5 will come at least once) =


P(5 will come at least once) =


Probability that 5 will come up at least once will


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