Question

Please answer these two questions I'll mark it brainiliest​

Answer 1

Answer:

1st answer is 100

2nd answer  is as follows Mean A=50,

h=20

We have:

sigma fi=120 (given)

⇒ 68+fi+f2=120

⇒ fi+f2=52 .....(1)

⇒Now, Mean=50

⇒X bar=a +h(sigma fiui divided by sigma fi)

⇒50=50+20*(4-fi+f2 divided by 120)

⇒50=50+4-fi+f2 divided by 6

⇒0=4-fi=f2 divided by 6

⇒fi-f2=4.....(2)

⇒From (1) and (2),

fi-f2=52

f1-f2=4

---------------------

2fi=56

⇒fi=28

⇒Substituting fi=28 in equation(1),

⇒28+f2=52

⇒f2=24

So the missing frequencies fi is 28 and f2 is 24

Hope it helps you :D!!

pls mark me as brainlist