InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
There are in all,10 balls; some of them are red and the others white.The average cost of all balls is Rs28.If the average cost of red balls is Rs25 and that of white balls is Rs30, the number of white balls is :1). 32). 53). 64). 7 |
| Answer» CORRECT ANSWER is: OPTION 3 | |
| 202. |
The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year.The age of the teacher is1). 38 years2). 39 years3). 40 years4). 41 years |
| Answer» 39 YEARS is the ANSWER | |
| 203. |
The average of x numbers is $y^{2}$ and the average of y numbers is $x^{2}$.So the average of all the numbers taken together is1). $\frac{x^{3}+y^{3}}{x+y}$2). xy3). $\frac{x^{2}+y^{2}}{x+y}$4). ${xy^{2}}+{yx^{2}}$ |
| Answer» CORRECT ANSWER is: OPTION 2 | |
| 204. |
A student was asked to find the arithmetic mean of the following 12 numbers :3, 11, 7, 9, 15, 13, 8, 19, 17,21, 14 and x .He found the mean to be 12.The value of x will be:1). 32). 73). 174). 31 |
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Answer» $Using\ the\Rule\ 1.$$Mean$$=\FRAC{3+11+9+7+15+13+8+19+17+21+14+x}{12}$$According to the QUESTION,$$\frac{137+x}{12}$$\therefore\ 137+x=144$$\therefore\ x=144-37=7$ |
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| 205. |
The average weight of 20 students in a class is increased by 0.75 kg when one of the students weighing 30 kg is replaced by a new student. Weight of the new student (in kg) is :1). 352). 403). 454). 50 |
| Answer» 40 : SEEMS CORRECT | |
| 206. |
The mean of 20 items is 55. If two items 45 and 30 are removed , the new mean of the remaining items is1). 65.12). 65.33). 56.94). 56 |
| Answer» OPTION 3 is the RIGHT ANSWER | |
| 207. |
The average monthly income of X and Y is Rs 5050.The average monthly income of Y and Z is Rs 6250 and the average monthly income of X and Z is Rs 5200.The monthly income of X is:1). Rs 40502). Rs 35003). Rs 40004). Rs 5000 |
| Answer» OPTION option 3 is the CORRECT ANSWER | |
| 208. |
The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new players is1). 19 years 1 month2). 19 years 6 months3). 19 years 11 months4). 19 years 5 months |
| Answer» 19 YEARS 6 months : - OPTION 3 | |
| 209. |
The average of first nine prime numbers is1). 92). 113). $11\frac{2}{9}$4). $11\frac{1}{9}$ |
| Answer» OPTION 4 is the RIGHT ANSWER | |