Wiley Edge Averages Quiz-2

Explanation:

17X = \frac{17}{2}* (2a+16d)

X = a+8d

13Y = \frac{17}{2}*(2a+16d) – (4a+26d)

Y = a+8.46d

 

 

Explanation:

Average income of all employees = 20000

New Average income of all employees = 22000(Average also increased by 2000)

Explanation:

Distance between home and Bank – x km

Total distance = x + x = 2x

Total time taken =\frac{x}{60} + \frac{\frac{x}{2}}{10} + \frac{\frac{x}{2}}{30}

= \frac{x}{12}

Average speed = \frac{2x}{\frac{x}{12}}= 24 kmph

 

Explanation:

Average of First six players = 49 * 6 = 294

Average of Last six players = 52 * 6 = 312; 

Average of all players = 50 * 11 = 550

Average weight of sixth player = 294 + 312 – 550 = 56 

Explanation :

Total workers T, so 7000*T = 9*5000 + (T9)*4000.

T = 3, so 3+9 =12

Explanation :

1000*5 + 2000*4 + 3000*3 + 2000 = 24000

24000/12 = 2000

Explanation:

Sum of ages of A+B+C 3 yrs ago = 27*3 = 81

So after 3 yrs, i.e. at present their total = 81 + 3*3 = 90

Similarly sum of present age of B&C = 20*2 +5*2 = 50

So present age of A = 90-50

Explanation:

Quantity used in 1st yr = \frac{8000}{20} = 400 l, in
2nd yr = \frac{8000}{22} = 363.6, in 3rd yr = 340.4
Total used in 3 yrs = 1104 litres, total
money spent in 3 yrs = 3*8000 = 24000
So average rate of 3 yrs = \frac{24000}{1104}

Explanation:

Average after 10 innings = 32, so after 11
inning = 32+4 = 36
So required runs = (36*11) – (32*10) = 76

5.None of these

 

Explanation :

Let total subjects are P.

Then, \frac{(74p + 20 + 16)}{p} = 78

So, P = 9