the average of numbers 0.64206 , 0.64207 , 0.64208 and 0.64209 is ?
"answer average = ( 0.64206 + 0.64207 + 0.64208 + 0.64209 ) / 4 = 2.5683 / 4 = 0.642075 correct option : d"
divide(add(multiply(0.64206, 0.64207), multiply(0.64206, 0.64208)), 0.64206)