Average Practice Question and Answer
8 Q: The average age of P, Q, R, and S is 30 years. How old is R?
I. The sum of ages of P and R is 60 years.
II. S is 10 years younger than R.
5045 05ee9aaafeee45c3b8374b264
5ee9aaafeee45c3b8374b264I. The sum of ages of P and R is 60 years.
II. S is 10 years younger than R.
- 1I alone sufficient while II alone not sufficient to answerfalse
- 2II alone sufficient while I alone not sufficient to answerfalse
- 3Either I or II alone sufficient to answerfalse
- 4Both I and II are not sufficient to answertrue
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Answer : 4. "Both I and II are not sufficient to answer"
Q: The average of all prime numbers 21 to 50 is (round off to one decimal number)
3969 05dcd4384f50c4b23b08334c1
5dcd4384f50c4b23b08334c1- 135.9true
- 234.8false
- 333.7false
- 432.9false
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Answer : 1. "35.9 "
Q: 30 oranges and 75 apples were purchased for Rs 510 If the price per apple was 2 then the average price of orange was?
3846 063285afb8146e66c29925ab4
63285afb8146e66c29925ab4- 1Rs 10false
- 2Rs 15false
- 3Rs 12true
- 4Rs 14false
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Answer : 3. "Rs 12"
Q: The average weight of 14 children is 22 kg. If the weight of the teacher is also included, then the average weight becomes 23 kg. What is the teacher's weight?
3377 05e293a199d14251e9f423dda
5e293a199d14251e9f423dda- 134 kgfalse
- 237 kgtrue
- 340 kgfalse
- 435 kgfalse
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Answer : 2. "37 kg"
Q: If a,b,c,d,e,f,g are seven consecutive odd number, their average is
3287 05e84259241a4013349c11af8
5e84259241a4013349c11af8- 1(a+6)true
- 2(abcdefg/7)false
- 3(a+b+c+d+e+f+g)/7false
- 4None of thesefalse
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Answer : 1. "(a+6)"
Q: What is the average of the squares of the first 19 natural numbers?
3025 05f353ec5122f0b4ab91a3c34
5f353ec5122f0b4ab91a3c34- 1130true
- 2133.5false
- 3124false
- 4127.5false
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Answer : 1. "130 "
Q: The average of three numbers is 154. The first number is double of the second number and the second is double of the third one. The first number is 3009 05d19dec87619fe30b9d345a8
5d19dec87619fe30b9d345a8- 1264true
- 2132false
- 388false
- 466false
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Answer : 1. "264"
Explanation :
let x y and z is three number
x:y
2:1
y:z
2:1
then we can find x:y:z is will be 4:2:1
Then 7/3=154
1=66
then the x will be=66*4=264
Q: One boy from a group of eight boys left and a new boy with a weight of 56 kg joined the group, which resulted in an average weight of 2.5 kg has increased, what is the weight of the new boy?
2971 05f80134f0a69ab3becc7b304
5f80134f0a69ab3becc7b304- 138.5 Kgfalse
- 238 Kgfalse
- 336.5 Kgfalse
- 436 Kgtrue
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