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The probabilities that a typist will mak...

The probabilities that a typist will make 0, 1, 2, 3, 4 and 5 or more mistakes in typing a report are respectively, 0.12, 0.25, 0.36, 0.14, 0.08 and 0.11.

Text Solution

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Sum of these probabilities must be equal to 1.
`P(0)+P(1)+P(2)+P(3)+P(4)+P(5)`
`=0.12+0.25+0.36+0.14+0.08+0.11=1.06`
which is greater than 1,
So, it is false statement.
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