Question

this question is from maths
I need the solution gies
plzzz help me to find out
u have to find medium class and modal class

Answer 1

literacy |frequency | square | f! .x!

rate | f! | sign(x!)|

50--60 | 9 | 55 | 495

60--70 | 6 | 65 | 390

70--80 | 8 | 75 | 600

80--90 | + 2 | 85 |+ 170

_______ ________

£f! =25 £f!x! =1655

____ £f!x!

X =------------

£f!

= 1655/25

=66.2