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The distribution of colours of beads in a bowl is given above. What is the proba...


Question

The distribution of colours of beads in a bowl is given above. What is the probability that a bead selected at random will be blue or white?

Options

A) 7/15

B) 2/5

C) 1/3

D) 1/15

The correct answer is C.

Explanation:

Total number of beads
= 1+2+4+5+3
=15
Number of blue beads = 1
P(Blue beads) = 1/15
Numbers of white beads = 4
P(white beads) = 4/15
∴P(Blue of white beads)
= P(Blue) + P(White)
= 1/15 + 4/15
= 5/15
= 1/3

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Dicussion (1)

  • Total number of beads
    = 1+2+4+5+3
    =15
    Number of blue beads = 1
    P(Blue beads) = 1/15
    Numbers of white beads = 4
    P(white beads) = 4/15
    ∴P(Blue of white beads)
    = P(Blue) + P(White)
    = 1/15 + 4/15
    = 5/15
    = 1/3

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