In a class of 125 students 70 passed inMathematics, 55 in statistics, and 30 in both. Then find the probability thata student selected at random from the class has passes in only one subject.

In a class of 125 students 70 passed inMathematics, 55 in statistics,

1.	In a class of 125 students 70 passed inMathematics, 55 in statistics, and 30 in both. Then find the probability thata student selected at random from the class has passes in only one subject.
Answer» Correct Answer - `13//25` Consider the following events: A: A student is passed in Mathematics B: A student is passed in Statistics Then, `P(A) = (70)/(125), P(B) = (55)/(125), P(A nn B) = (30)/(125)` Required probability is `P(A nn barB) + P(barA nn B)` `=P(A) + P(B) - 2P(A nn B)` `=(70)/(125) + (55)/(125) - (60)/(125) = (65)/(125) = (13)/(25)`

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In a class of 125 students 70 passed inMathematics, 55 in statistics, and 30 in both. Then find the probability thata student selected at random from the class has passes in only one subject.

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