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Maths Puzzle
Numerical Ability
Probability
A basket contains 15 apples and 10 oranges out of which 4 apples and 2 oranges are defective. If a person takes two fruits at random, what is the probability that either both are apples or both are good
Read Solution (Total 2)
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- Total apples 15 ;good apples 15-4=11
Total oranges 10 ;good oranges 10-2=8
Sample space =25c2 = 300
N(e)=both are apples(Can be good or bad) + both fruits are good fruits (apple and orange) - good apple(good apple comes in both category,so excluding)
15c2 + 19c2 - 11c2
=221
P(e)=221/300 - 7 years agoHelpfull: Yes(1) No(0)
- (15C2/25C2)+(11C2/25C2)=4/9
- 10 years agoHelpfull: Yes(0) No(0)
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