If you have 47 bts armys and you have one hater

Welp then you win.

Step-by-step explanation:

Oop, I am dead then

Step-by-step explanation:

Mean of a grouped data =

sum of Fx/sum of F

where f is the frequency

sum of F = 7+8+13+9+3 = 40

To find x calculate the average of each of the two classes in the table

That's

x is

120+124/2= 122cm

124+128/2 = 126cm

128+132/2 = 130cm

132+136/2 = 134cm

136+140/2 = 138cm

So Fx = 7(122) + 8(126) + 13(130) + 9(134) + 3( 138)

= 5172

Mean = 5172/40

= 129.3

= 129cm

Hope this helps