जॉइन Examsbookउत्तर : 3. "316/435"
A basket contains 10 apples and 20 oranges out of which 3 apples and 5 oranges are defective. If we choose two fruits at random, what is the probability that either both are oranges or both are non defective?5
प्र: A basket contains 10 apples and 20 oranges out of which 3 apples and 5 oranges are defective. If we choose two fruits at random, what is the probability that either both are oranges or both are non defective?
- 1136/345false
- 217/87false
- 3316/435true
- 4158/435false
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उत्तर : 3. "316/435"
व्याख्या :
Answer: C) 316/435 Explanation: ns=C230 Let A be the event of getting two oranges and B be the event of getting two non-defective fruits. and A∩B be the event of getting two non-defective oranges ∴ PA=C220C230, PB=C222C230 and PA∩B=C215C230 ∴PA∪B=PA+PB-PA∩B = C220C230+C222C230-C215C230=316435
समान प्रश्न
Since Nithya and Suganya exchange places, so Rita’s new position is the same as Monika’s earlier position. This position is 17th from the right and 10th from the left. Therefore Number of girls in the row = (16 + 1 + 9) = 26.