The probability of selecting a red ball at random from the jar that co

1.	The probability of selecting a red ball at random from the jar that contains only red, blue and orange balls is 1/4.The probability of selecting a blue ball at random from the same jar is 1/3. If the jar contains 10 orange balls, find the total number of balls in the jar.
Answer» Let total number of balls = x Orange balls in the jar = 10 P(getting an orange ball) = 10/x Since jar contains only red, blue and orange balls. P(getting a red ball) + P(getting a blue ball) + P(getting a orange ball) = 1 (Because sum of probability = 1) 1/4 + 1/3 + 10/x = 1 3x + 4x + 120 = 12x x = 24 Hence there are total 24 balls in the jar.

The probability of selecting a red ball at random from the jar that contains only red, blue and orange balls is 1/4.The probability of selecting a blue ball at random from the same jar is 1/3. If the jar contains 10 orange balls, find the total number of balls in the jar.

Answer»

Let total number of balls = x

Orange balls in the jar = 10

P(getting an orange ball) = 10/x

Since jar contains only red, blue and orange balls.

P(getting a red ball) + P(getting a blue ball) + P(getting a orange ball) = 1

(Because sum of probability = 1)

1/4 + 1/3 + 10/x = 1

3x + 4x + 120 = 12x

x = 24

Hence there are total 24 balls in the jar.

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The probability of selecting a red ball at random from the jar that contains only red, blue and orange balls is 1/4.The probability of selecting a blue ball at random from the same jar is 1/3. If the jar contains 10 orange balls, find the total number of balls in the jar.

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