Answer:

A,B,C=180,150,60

Step-by-step explanation:

A:B:C=1/5:1/6:1/15

so lcm of 5,6,15 is 30

multiply with 30 for all the ratio's

A:B:C=6:5:2

A=390×6/13=180

B=390×5/13=150

C=390×2/13=60

hope you understand

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Answer:

ratio of A ,B,C= 1/5:1/6:1/15

or

A:B:C= 6:5:2

so A+B+C=( 6+5+2)x=390

x=30 unit

so

A=6*30=180

B=5*30=150

C=2*30=60