Question

6) The value of mean is 56.8and sigma xifi = 2840. What is the value of N ? ​

Answer 1

Answer:

mean = stigma fixi by fi

stigma - summation

fixi product of sum of fi and sum of xi

fi-sum of fi

20400/560

50

Answer 2

Step-by-step explanation:

Mean=a+

∑f

i

∑f

i

u

i

×h,u

i

=

h

x

i

−a

a=25,h=10,∑f

i

u

i

=20,∑f

i

=100

Mean =25+

100

20

×10=27