Question

15 The sum of any 3 numbers of A.P is 36, then the 2nd number is b. 18 d. 12 a. 14 C. 15
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Answer 1

Answer:

12

Step-by-step explanation:

by using the formula

3(a+d)

a+d+a+d+a+d=36

3(a+d)=36

a+d=12

12