Algebra> Himani rolls two standard cubes. Find the...

Himani rolls two standard cubes. Find the probability that the sum of the roll is 5, given that one cube came up even and the other came up odd. a) 1/36 b)1/9 c)5/36 d)2/9

Samir Madan , 12 Years ago

Grade 12

2 Answers

bharat bajaj

As it is given that one is even & one is odd, the sample space is not 36, it is only 18 !
Sample spacewith favourable outcomes :
1 & 4
4 & 1
2 & 3
3 & 2


Probability = 2/9
Thanks & Regards
Bharat Bajaj
askIITians Faculty
IIT Delhi

Approved

Last Activity: 12 Years ago

SREE NIGAMADITYA NIMMAGADDA

for this the outcomes can be 4&1, 1&4, 2&3, 3&2, but here we might think that sample space is `36` but its "18" since it is given that one is even and one is odd. so the probability would be equal to "4/18"=2/9

Last Activity: 12 Years ago