Syntel Company Numerical Ability Averages

The weight of a body as calculated by the average of 7 different experiments is 53.735 g. The average of the first three experiments is 54.005 g, of the fourth is 0.004 g greater than the fifth, while the average of the sixth and seventh experiment was 0.010 g less than the average of the first three. Find the weight of the body obtained by the fourth experiment.
1. 49.353 g
2. 51.718 g
3. 53.342 g
4. 54.512 g

Read Solution (Total 2)

53.342
YAAR SOLUTION THODA LAMBA H M NAI LIKH RAHA...
10 years agoHelpfull: Yes(6) No(6)

total sum of 7 experiments weights=7*53.735
total sum of First 3 experiments weights=3*54.005
Weight of 5th Experiment = Xkg
Weight of 4th Experiment = X+0.004kg
total sum of 6th and 7th experiments weights=2*53.995
So the Solution For the Question Given Below ,

7*53.735=3*54.005+X+(X+0.004)+2*53.995,
So, 2X=106.676
X=53.338
So 4th Experiment Weight = X + 0.004=53.342
9 years agoHelpfull: Yes(3) No(2)

Syntel Other Question

A scored 30% marks and failed by 15 marks. B scored 40% marks and obtained 35 marksmore than those required to pass. The pass percentage is:
1. 33%
2. 40%
3. 34%
4. 48% Find the average weight of four containers, if it is known that the weight of the first container is 100 kg and the total of the second, third and fourth containers’ weight is defined by f(x) = x2 – 3/4 (x2), where x = 100.
1. 650 kg
2. 880 kg
3. 760 kg
4. 460 kg