Question

the Arithmetic mean of 5 numbers is 60 what is their sum​

Answer 1

Answer:

750

Step-by-step explanation:

a1 +a5 / 5 =60

a1 + a5 = 300

Sn = (n/2)×[a+L]

here a is a1 and L is last term a5

Sn = (5/2)×(300) = 750