Q No 2 The average of six numbers is 30 If the average of first four is 25 and that

My answer is A. Here is the explanation -
The average of first four is 25 => total = 25*4 = 100
The average of last three is 35 => total = 35*3 = 105
The average of six is 30 => total = 30*6 = 180

So we can form an equation - assuming fourth number = x
100+105-x = 180
Hence x = 25.
12 years agoHelpfull: Yes(8) No(3)
ans is 25 as 100-3*35=25
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12 years agoHelpfull: Yes(6) No(4)
conside xi+x2+x3+x4+x5+x6=30*6, -------3
x1+x2+x3+x4=25*4------(1)
x5+x6+x4=35*3----------(2)
solving 1,2,3
180-x5-x6=100
180+x4-105=100
therfore x4=25
12 years agoHelpfull: Yes(5) No(2)
Answer is 25. let the numbers are x1, x2, x3, x4, x5 & x6
from 1st option x1+x2+x3+x4+x5+x6= 30*6=180 (let, eq 1).
from 2nd option we get: x1+x2+x3+x4= 25*4=100 or, x1+x2+x3= 100-x4
from 3rd option we get: x4+x5+x6=35*3=105 or, x5+x6= 105-4.
now we put the value of (x1+x2+x3) & (x5+x6) in eq 1. then we get the result.
12 years agoHelpfull: Yes(3) No(1)
no are a,b,c,d,e,f
given (a+b+c+d+e+f)6=30
(a+b+c+d)4=25 (a+b+c+d)=100 (a+b+c)=100-d
(d+e+f)3=35 (d+e+f)=105 (e+f)=105-d
(a+b+c+d+e+f)=180
100-d+d+105-d=180
205-d=180
d=25
12 years agoHelpfull: Yes(3) No(0)
a+b+c+d+e+f/6=30
a+b+c+d/4=25
d+e+f/3=35
a+b+c+d+e+f=180
a+b+c+d=100
d+e+f=105
e+f=80
d+80=105
d=105-80
d=25
ans ) a
10 years agoHelpfull: Yes(2) No(2)
the ans is 35.
12 years agoHelpfull: Yes(0) No(2)

Q. No.2: The average of six numbers is 30.If the average of first four is 25 and that of last three is 35, the fourth number is?

A. 25

B. 30

C.35

D.40