1. Which of the following pairs are co-prime? (a) 14.20 (b) 15, 28 (c) 50, 55
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To find out co prime, we need to find the common factors ( It should be 1 only ), Ok ??
Now after we will find out all the factors we will see that 15 , 28 are the only number that has common factor as 1 . So
VOILA!!! it is the correct one .
Please mark me as brainliest.
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