Question

Find the class, if the class mark is 10 and class width is 6.

Answer 1

Hey user



Here is your answer



Let the class be x - y.



We know that



$class \: \: mark \: \: = \frac{x + y}{2} \\ \\ \\ 10 = \frac{x + y}{2} \\ \\ \\ x + y = 20$



x + y = 20 ...1



class width is 6 .



so



y - x = 6 ...2



Adding equations 1 & 2 we get



2y = 26



y = 13



putting y = 13 in equation 1



x + 13 = 20



x = 7



So the required class is 7 - 13 .



thank you.

Answer 2

Class Interval Is

7-13