a) 0.8 m
b) 0.9 m
c) 0.95 m
d) 1.05 m
Answer: a
Explanation: Sum of height of the 5 boys
= (25 × 1.4 – 20 × 1.55) m
= 4 m
Required average = $$\left( {\frac{4}{5}} \right)$$
= 0.8 m
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