The average of 13 numbers is 42. If a $$14^{th}$$ numberis included, then the average becomes 44. Whatis the $$14^{th}$$ number?
Average of 13 numbers = 42
Total of 13 numbers = 42 $$\times$$ 13 = 546
If 14th number is included , then the average becomes 44.
Let the 14th number be x.
$$\frac{546 + x}{14} = 44 => x = 70$$
So, the answer would be option a)70.
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