Question

if avrage of A,B,C is 20 B,C,D is 25and value of D is 30 find value of A
plz answer fast​

Answer 1

Answer:

A=15

Step-by-step explanation:

As we know average = Sum of numbers / number of terms

A+B+C/3 = 20

so A+B+C = 60

also B+C+D/3 = 25

so B+C+D = 75

As D = 30 -------given

so B+C = 45--------@

therefore A+45= 60

so A= 15

Answer 2

Step-by-step explanation:

A=15.

Please look at the attachment for better explanation.