Answer:
C
Step-by-step explanation:
The L.C.M of the denominators is 30. Then, divide this 30 by the denominators respectively and multiply each quotient by each of their numerator. For example,6(the first denominator) divide 30=5,then multiply 5 by 1. Do this for all of them. Add the results and divide by 30. That is 42/30=1 2/5
