Quantitative Aptitude
Open Flashcards
Percentage & Averages
Question
2 out of 30
A class has two sections in one of which there are 40 students with an average age of 14. 5 years. The average of the whole class is 14. 2 years. If there be 32 students in the other section, its average age is
A  13.525 years 
B  13.625 years 
C  13.725 years 
D  13.850 years 
E  None of These

Ans. E 72 x 14.2 = 40 x 14.5 + 32 x X
1022.4 = 580 + 32x
32x = 1022.4 – 580
X = 13.825
Percentage & Averages Flashcard List
30 flashcards
1) 
2) 
3) 
4) 
5) 
6) 
7) 
8) 
9) 
10) 
11) 
12) 
13) 
14) 
15) 
16) 
17) 
18) 
19) 
20) 
21) 
22) 
23) 
24) 
25) 
26) 
27) 
28) 
29) 
30) 