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Numerical Ability
Probability
There are 500 students in an examination. 150 students passed the first paper, 350 students passed the second paper and 50 students passed both the papers. Find the probability that a student selected at random has failed in both the papers.
a) 1/5
b) 1/10
c) 3/10
d) 3/5
Read Solution (Total 5)
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- 5o students are passed in both papers so 100 students are passed in only 1st paper and 300 students are passed in only 2nd paper there are 500 students remaining 50 students failed in both papers so the probability is 50/500=1/10
- 12 years agoHelpfull: Yes(22) No(5)
- Total no. of student=500
than 500-150-350+50=50
=50/500=1/10 - 12 years agoHelpfull: Yes(8) No(3)
- ans=3/5
1-1/10 - 12 years agoHelpfull: Yes(2) No(7)
- ans is 9/10
- 12 years agoHelpfull: Yes(0) No(4)
- 100/500=1/5
- 9 years agoHelpfull: Yes(0) No(0)
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