Questions
Three boys and two girls stand in a queue. The probability, that the number of boys ahead of every girl is at least one more than the number of girls ahead of her, is
detailed solution
Correct option is A
3 Boys and 2 Girls ...(1) B (2) B (3) B (4)Girl can't occupy 4th position.Either girls can occupy 2 of 1, 2, 3 position or they can both be at position (1) or (2).Hence, total number of ways in which girls can be seated=3C2×2!×3!+2C1×2!×3!=36+24=60.Number of ways in which 3 boys and 2 girls can be seated = 5!∴ Required probability =605!=12Talk to our academic expert!
Similar Questions
A bag contains 10 different balls. Five balls are drawn simultaneously and then replaced and then seven balls are drawn. If the probability that exactly three balls are common to the two draws is p, then the value of 8p is ________.
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