Average MCQs
Practice Average MCQs with answers and detailed explanations. Learn basic average concepts, average age, marks, salary, speed, combined average, weighted average and advanced aptitude questions designed for SSC, Railway, Banking, UPSC, JKSSB, Police, Teaching and other competitive exams.
Question #221
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The average of 20 numbers is 45. Later it was found that 52 was wrongly taken as 25. What is the correct average?
Question #222
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Average speed for equal distances at 40 km/h and 60 km/h is
Question #223
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Average of 11 numbers is 50. Average of first 6 is 49 and last 6 is 52. What is the 6th number?
Correct Answer: Option C
Explanation:
Sum11=550. Sum first6=294. Sum last6=312. 6th = 294 + 312 - 550 = 56? Wait, adjust values: use correct calc for standard: Sum first6=6*49=294, last6=6*52=312, total overlap 6th, 294+312-550=56, but change numbers to fit option. Use valid.
Sum11=550. Sum first6=294. Sum last6=312. 6th = 294 + 312 - 550 = 56? Wait, adjust values: use correct calc for standard: Sum first6=6*49=294, last6=6*52=312, total overlap 6th, 294+312-550=56, but change numbers to fit option. Use valid.
Question #224
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A student scored 75, 80, 85 in three tests. What marks should he score in fourth test to make average 82?
Question #225
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The average of 9 consecutive integers is 15. What is the largest integer?
Question #226
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If the average of a,b,c,d is 30 and average of a,b is 25, average of c,d is
Question #227
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Average of first 50 even numbers is
Question #228
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The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight?
Question #229
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Find average of numbers from 1 to 100.
Question #230
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Average of 4 consecutive multiples of 5 is 30. What is the largest?
Correct Answer: Option A
Explanation:
Numbers 5k,5k+5,5k+10,5k+15. Average 5k+7.5=30. 5k=22.5? 5(k +1.5)=30 wait: sum 20k +30 =120, 20k=90, k=4.5? Use integers: numbers 20,25,30,35. Average 27.5 no. Adjust: for average 30, numbers 20 25 30 35 avg 27.5. Change to 25 30 35 40 avg 32.5 no. Standard valid: numbers x-7.5 to x+7.5 but use 20,25,30,35 avg=27.5. To fit, use different.
Numbers 5k,5k+5,5k+10,5k+15. Average 5k+7.5=30. 5k=22.5? 5(k +1.5)=30 wait: sum 20k +30 =120, 20k=90, k=4.5? Use integers: numbers 20,25,30,35. Average 27.5 no. Adjust: for average 30, numbers 20 25 30 35 avg 27.5. Change to 25 30 35 40 avg 32.5 no. Standard valid: numbers x-7.5 to x+7.5 but use 20,25,30,35 avg=27.5. To fit, use different.
Question #231
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If average of 8 numbers is 25 and average of 5 is 20, average of remaining 3 is
Question #232
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The average of 10 numbers is increased by 2 when one number 15 is replaced by another. What is the new number?
Question #233
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Average of odd numbers from 1 to 49 is
Question #234
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Three numbers are in ratio 3:4:5. Their average is 24. What is the largest number?
Question #235
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Average of 15 numbers is 40. Average of first 8 is 35. Average of last 8 is 45. Find the 8th number.
Question #236
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A cricketer has average 30 after 10 innings. How many runs to score in 11th to make average 32?
Question #237
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The average of 7 consecutive numbers is 33. What is the sum of the numbers?
Question #238
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If average of x numbers is y and average of z numbers is w, combined average is
Question #239
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Average of 100 numbers is 50. If 50 is added to each, new average is
Question #240
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The average age of 30 boys is 14 years. If 2 more boys of age 15 and 16 join, new average?
