Question

Average 20 numbers is ‘x’. If the average of first 12 numbers is 72.5 while average of last 5 numbers is 82.2 and 13th, 14th and 15th numbers are (3x - 42), (x + 50) and 183 respectively. Find the 14th number.

A 132
B 137
C 142
D 131
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