Question

On an average, one in every 50 valves manufactured by a firm is substandard. If valves are supplied in packets of 100 each ,in how many of a lot of 2000 packets would you expect substandard valves?

Answer 1

Answer:

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Answer 2

The number of substandard valves in a lot of 2000 packets is 4000.

Explanation:

Given:

On an average, one in every 50 valves  is substandard.

valves are supplied in packets of 100 each.

To Find:

The number of substandard valves in a lot of 2000 packets.

Solution:

As given,on an average, one in every 50 valves  is substandard.

No. of substandard valve in  every 50 valves $=1$.

As given,valves are supplied in packets of 100 each.

Nos.of  valves in a  packet = 100.

Nos. of  substandard  valve in one packet $=\frac{100}{50} =2$

Therefore,the number of substandard valves in a lot of 2000 packets

                                                                     $=2000\times 2= 4000$

Thus,the number of substandard valves in a lot of 2000 packets is 4000.

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