Aptitude contest - 121

[HELP]

1. Out of 9 persons, 8 persons spent Rs. 30
each for their meals. The ninth one spent Rs. 20 more than the average
expenditure of all the nine. The total money spent by all of them was:[/b]






(a) Rs. 260




(b) Rs. 290




(c) Rs.
292.50




(d) Rs.
400.50






2. The average of 50 numbers is 30. If two
numbers, 35 and 40 are discarded, then the average of the remaining numbers is
nearly:[/b]









(a) 28.32




(b) 28.78




(c) 29.27




(d) 29.68









3. The average of five numbers is 27. If one
number is excluded, the average becomes 25.The excluded number is :[/b]









(a) 25




(b) 27




(c) 30




(d) 35








4. The average age of 35 students in a class is
16 years. The average age of 21 students is 14. What is the average age
of-remaining 14 students?[/b]




(a) 15 years




(b) 17 years




(c) 18 years




(d) 19 years









5. 16 children are to be divided into two
groups A and B of 10 and 6 children. The average percent marks obtained by the
children of group A is 75 and the average percent marks of all the 16 children
is 76. What is the average percent marks of children of group B ?[/b]










(a) 77- 1/3




(b) 77- 1/3




(c) 78- 1/3




(d) 78- 1/3














6. The average score of a cHcketer for ten
matches is 38.9 runs. If the average for the first six matches is 42, then find
the average for the last four matches.[/b]









(a) 33.25




(b) 33.5




(c) 34.25




(d) 35









7. The average of six numbers is 3.95. The
average of two of them is 3.4 while the average of the other two is 3.85. What
is the average of the remaining two numbers?[/b]




(a) 4.5




(b) 4.6




(c) 4.7


(d) 4.8

[sangee_16]

1.c
2.d
3.d
4.d
5.a
6.c
7.b
iam not sure of this ans.check it.
Sangeetha

[keerthana]

i too got the same answers

but i didnt got correct answer for 7 th one .. any one plz check it i might be wrong

[WISDOM]

7. (b) 4.6; sangeetha (ma'am), u r abs rightin 7th question!

required avg =[ (3.95*6) - (3.4*2) - (3.85*2) ]/2 = 4.6

[innova]

2. The average of 50 numbers is 30. If two
numbers, 35 and 40 are discarded, then the average of the remaining numbers is
nearly:[/b]






(50*30)-(35+40)/48=29.68

[innova]

3. The average of five numbers is 27. If one
number is excluded, the average becomes 25.The excluded number is :[/b]











(a) 25





(b) 27





(c) 30



(d) 35



let the excluded no be x

(27*5) - x/4=25



solving this x=35//

[sreepriyareddy]

how did u got the ans for 1st one

?

[WISDOM]

Originally Posted by sreepriyareddy

how did u got the ans for 1st one

?

let total money spent =x

8 persons spend 240 rs and ninth spend x/9 +20

=> 240 + x/9 +20 = x

=> 8x/9 = 260

=> x = 292.50