Math, asked by divu29065, 11 months ago

plz do i have given ans also plz do explaination

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Answered by RvChaudharY50

0

Answer:

FX sum = 190+30(5a+3)+50*32+70(7a-11)+90*19 = 2780+150a+90+490a-770

= 2800+640a

now mean = FX/x

putting value ,

(2800+640a)/(60+12a) = 50

2800+640a = 3000+600a

40a = 200

a = 5

frequency of 30 = 5*5+3 = 28

Frequency of 70 = (7*5-11) = 24 (Ans)

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