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