**x, y and z are three positive numbers such that y is $$ 4\\over5 $$ times of x and z is $$ 5\\over8 $$ times of y. If the average of reciprocals of the numbers x, y and z is $$ \\frac{17}{240} $$ , then the average of 3 times of x and 5 times of y will be:** A) 60 B) 70 C) 45 D) 40 Click Link for Answer