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A die is rolled 20 times . Getting ...

A die is rolled 20 times . Getting a number greater than 4 is a success.
Find the mean and variance of the number of successes .

A

`6.6, 4.4`

B

`6.5,4.5`

C

`6.3,4.3`

D

`6.2,4.2`

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A
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