Questions
If any four numbers are selected and they are multiplied, then the probability that the last digit will 1,3,5 or 7 is
detailed solution
Correct option is B
The total number of ways = 63 =216If the second number is i (i > 1 ), then the total numberof favorable ways =∑i=15 (i−1)(6−i)=20.', Required probability =20216=554Talk 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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