A bag contains 5 black, 4 white and x red marbles. If the probability of picking a red marble is 2/5, find the value of x
a
8
b
10
c
4
d
6
Explanation
Correct Option
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A bag contains 5 black, 4 white and x red marbles. If the probability of picking a red marble is 2/5, find the value of x
8
10
4
6