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5, 7, x+3 , 2x+5 ,16, 20 എന്നിവ ആരോഹണ ക്രമത്തിൽ ആണ് ഇതിന്റെ മധ്യാങ്കം 14.5 എങ്കിൽ x-ന്റെ വിലയെത്ര ?

A9

B7

C5

D8

Answer:

B. 7

Read Explanation:

n ഇരട്ട സംഖ്യ ആയതോണ്ട്

മധ്യാങ്കം = $\frac{(x+3+2x+5)}{2}$ = 14.5

3x+8= 14.5 x 2 = 29

3x = 21

x = 7


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