InfyTQ Averages Quiz 2

Solution:
As, the given consecutive numbers forms A.P. series,
In AP series, Middle term is same as the average of first and last term,

Hence, Z= 46
Therefore,L=42, M=44, Z=46, P=48 and T =50.

Average Weight of All boys = \frac{(16\times 51+8 \times 54)}{(16+8)} = 52

A. P= 14 ,28, ......

a =14

d=14

2nd multiple is 28

Third multiple =28+14=42

Fourth multiple =42+14=56

Fifth multiple =56+14=70

So first 5 multiples are 14,28,42,56,70

therefore average= \frac{(14+28+42+56+70)}{5}

= 42

Solution:
Sum of weight of all students of Section A = 36 x 42 = 1512
Sum of weight of all students of Section B = 44 x 48 = 2112

Average weight of the whole class \frac{(1512+2112)}{(36+44)}= \frac{3624}{80}= 45.3

Solution:
Average speed = \frac{2\times 45\times 55}{(45+55)}=\frac{4950}{100} = 49.5

Solution:
Average speed =\frac{2\times 38\times 42}{(38+42)}= \frac{3192}{80} = 39.9

Solution:
Average speed =\frac{2\times 65 \times 55}{(65+55)}= \frac{7150}{120} = 59.58

Solution:
Average = \frac{(20\times 30-45-35)}{18} = 28.89

Solution:
Average =\frac{(15 \times 40-45-35)}{13} = 40

Solution:
Total sum of 15 numbers, = (15 x 40)+45+35 = 680

Average= \frac{680}{17}= 40