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In a battery manufacturing factory, mach...

In a battery manufacturing factory, machines P, Q and R manufacture 20%, 30% and 50% respectively of the total output. The chances that a defective battery is produced by these machines are 1%, 1.5% and 2% respectively. If a battery is selected as random from production, then the probability that it is defective is

A

`69/2000`

B

`33/2000`

C

`1/40`

D

`29/2000`

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The correct Answer is:
B
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