Question

A jar contains 48 marbles each of which is either blue or green or red . The probability of selecting a green marble is 1/4 , red is 1/3 . How many blue marbles does the jar contain .

Answer 1

Step-by-step explanation:

lets consider this question -- A jar contains 54 marbles each of which is blue, green or white. The probability of selecting a blue marble at random from the jar is 1/3, and the probability of selecting a green marble at random is 4/9. How many white marbles does the jar contain?

Answer:

Total number of marbles in the jar= 54.

P(getting a blue marble) = 13 and P(getting a green marble) =49.

Let P (getting a white marble) be x.

Since there are only three given types of marbles in the jar, we have

1/3+4/9+x=1⇒79+x=1−7/9=2/9.

∴ P(getting a white marble) = 2/9.

Let the number of white marbles be n.

Then, P(getting a white marble) = n/54.

∴n/54=2/9⇒9n=108 ⇒ n=12.

Hecne, there are 12 white marbles in the jar

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Answer 2

Step-by-step explanation:

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