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प्रश्न
A glass jar contains 6 red, 5 green, 4 blue and 5 yellow marbles of same size. Hari takes out a marble from the jar at random. What is the probability that the chosen marble is of red colour?
विकल्प
`7/10`
`3/10`
`4/5`
`2/5`
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उत्तर
`bb(3/10)`
Explanation:
As, jar contains 6 red, 5 green, 4 blue and 5 yellow marbles of same size.
Then, probability that the chosen marble is of red colour
= `"Number of red marbles"/"Total number of marbles"`
= `6/(6 + 5 + 4 + 5)`
= `6/20`
= `3/10`
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