Wiley Edge Averages Quiz-3

Explanation :
Let the weight of new man is x kg.
\frac{(12p – 56 + x)}{12} = p + 3.5 [12p is the total weight of 12 people]
X = 98kg

Explanation :
Total age of committee = 48*12
new total age of committee = \frac{(48*12 – 62 + 26)}{12} = 45

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Explanation :
Average of class = 19 = \frac{Sum}{(b+g)}
sum (girls) = g*17
sum (boys) = b*20
19b + 19g = 17g + 20b
2g = b = 20.
So girls = 10

Explanation :

sum of all ten reading = 255

sum of first three = 60 and sum of next 4 = 104.

Sum of 8th, 9th and 10th reading = 91 = 3*x + 13

X = 26

 

Explanation :
Let the income of seventh month is A, then
12*5000 = 5300*7 + 5300*6 – A
A = 4700

Explanation :
No of 3 wheeler = x, no of wheels = 3x
No of 2 wheeler = 5x, no of wheels = 10x
No of 4 wheeler =5x, no of wheels = 20x
Avg = 3x+10x+\frac{20x}{x}+5x+5x = \frac{33x}{11x} = 3

Explanation:

According to the ShortCut Approach:

ValueOf(\frac{n+1}{2})Result = (\frac{n+1}{2}\times (b+c) - n\times a)

Where,

n is the total number of days= 7 days

b is the average of first four days = 25

c is the average of last four days = 25.5

a is the average of whole days = 25.2

 

=(\frac{8}{2})\times (50.5)-176.4

202 - 176.4 = 25.6°C

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Explanation:
Total number of marks = 88 × 6 = 528
Now, 528 – 86 + 68 = 510
Required Average=\frac{510}{6}=85