A woman bought 210
1 answer:
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Given that original lenght of the board before cut meter
Lenght of the board that is left after cutting from the original piece by Hernan meter
Now we have to find the lenght of the piece which is cut.
To find that we just need to subtract smaller piece from larger piece
Required Length meter
Required Length meter
Required Lengthmeter
reduce the fraction
Required Length meter
Hence final answer is meter.
Try this solution:
1. for probability of both televisions work:
2. for probability of at least on is defective (it means, the sum = one is defective and two are defective):
- for P(1defective);
- for P(2defective);
totaly for at least one is defective: