10. Find the largest among the arithmetic means, if three arithmetic means are inserted between 2 and 22.
A.7
B.12
C. 14
D. 17
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10. Find the largest among the arithmetic means, if three arithmetic means are inserted between 2 and 22.
A.7
B.12
C. 14
D. 17
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Answer:
D. 17
Step-by-step explanation:
First find the difference (d)
d = an-ak/n-k
d = 22-2/5-1
d = 20/4
d = 5
So to get the largest among the three missing terms we substract the difference (d) fron the last term (22)
a4 = a5-d
a4 = 22-5
a4 = 17