Topics

General Knowledge
General Science
General English
Aptitude
General Computer Science
General Intellingence and Reasoning
Current Affairs
Exams
Elementary Mathematics
English Literature

The total of the ages of a class of 60 girls is 900 years. The average age of 20 of the girls is 12 years and that of the other 20 girls is 16 years. What is the average age of the remaining girls?

A) 14 years
B) 13 years
C) 16 years
D) 17 years
E) Other than those given as options

Correct Answer:




D) 17 years

Description for Correct answer:
Let the average age of remaining 20 girls

According to question,

\( \Large 20 \times 12 + 20 \times 16 \times x = 900 \)

\( \Large 240 + 320 + 20x = 900 \)

\( \Large 20x = 900 - 560 \)

\( \Large 20x = 340 \)

\( \Large x = 17years \)

Part of solved SBI JuniorAssociates-Prelims questions and answers : Exams >> Bank Exams >> SBI JuniorAssociates-Prelims

Comments

Similar Questions

1). A and B started a business with initial investment in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A's investment was 7 months. B invested the money for?

A). 6 months

B). \( \Large 2\frac{1}{2} \) months

C). 10 months

D). 4 months

E). 7 months

2). A shopkeeper sold an article for Rs 1,380 at a loss of 8%. At what price e should it be sold to gain a profit of 8% ?

A). Rs 1,560

B). Rs 1,620

C). Rs 1,680

D). Rs 1,740

E). None of these

3). 60% of 480 + 48% of 600 = ?

A). 766

B). 288

C). 576

D). 276

E). None of these

4). \( \Large 5580 - 73 \times 12\div? = 4824 \)

A). 160

B). 320

C). 180

D). 120

E). None of these

5). \( \Large \sqrt{3969} + \sqrt{7921} = ? \)

A). 148

B). 150

C). 152

D). 154

E). 156

6). \( \Large \sqrt{?} + 416 = \) (60 % of 920) - 110

A). 576

B). 767

C). 784

D). 1024

E). 1156

7). \( \Large 1170 \div 26 + \left(785 - 423 + ?\right) = 440 \)

A). 37

B). 33

C). 38

D). 43

E). None of these

8). A profit of 25% is earned on goods when a discount of 20% is allowed on the marked price What profit percentage Will be earned When a discount of 10% is allowed on the marked price ?

A). \( \Large 45\frac{9}{11} \)%

B). \( \Large 42\frac{3}{4} \)%

C). \( \Large 40\frac{5}{8} \)%

D). \( \Large 37\frac{2}{3} \)%

E). None of these

9). The compound interest on a certain sum for 2 years at 20% per annum is Rs 880/- The simple interest on the same sum for double the time at half the rate percent per annum is :

A). Rs 800/-

B). Rs 1,000/-

C). Rs 1,200/-

D). Rs 1,600/-

E). None of these

10). A tap can empty a tank in one hour. A second tap can empty it in 30 min. If both the taps operate Simultaneously, how much time is needed to empty the tank ?

A). 20 min

B). 30min

C). 40 min

D). 45 min

E). None of these