There are 18 beads in a box . Some of them are white and the remaining are black.
The probability of drawing a black bead is 1/3 , Then
a) How many black beads are there in the box?
b) How many white beads are there in the box?
c) How many white beads should be added to it so that the probability of
drawing a black bead becomes ¼
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Answer:
a) 6 b) 12 c) 12
Step-by-step explanation:
no of black beads = 1/3 × 18 = 6
no of white = 18 - 6 = 12
required white beads = 6:X::1:4
=> X = 24
.: no of more white beads = 24-12 = 12
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