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Let the required number = (LCM of denominator 5 and 8) = 40 According to the question, Wrong answer = 8/5 times; 40 = 64 Correct answer = 5/8 times; 40 = 25 Required percentage of error = [(64 - 25)/25]times; 100 = 156%
The average marks scored by 20 boys and 45 girls are 88 and 94 respectively. Find the average marks scored by all the students together. (Answer should ...
The average age of a family of 3 members is 36 years. If the father’s age is 10 years more than the mother’s age, and the age of the son is 4 years ...
20 students go for a picnic. 10 of them spent Rs. 64 each on their food and rest spent Rs.4 more than the average expenditure of all 20. What was the to...
Three numbers are given such that when the average of any two numbers is added to the third number, the resulting sums are 350, 330, and 310. Determine ...
Anita bought a refrigerator at a discount of 20% on MRP. She earned one-third the amount of her CP by renting it for 300 days. After that, she resells i...
Each side of a rhombus is 20cm long and the length of one of its diagonals is 24cm, then find the area of the rhombus.
The average of the first 10 numbers is 'x+20', the average of the next 14 numbers is 'x', and the average of the remaining 16 numbers is 'x−30'. If th...
The average height of each student in a class of 15 students is 160 cm. If 6 new students joined the class, then the average height of the each student ...
The average of 4, 6, 8, 12 and x is 7 and the average of x, 9, 13, 15 and y is 9. What is the value of 2x – 3y?
The average age of a class of 18 girls is 14 years. If 2 new girls having average age of 10 years join the class, then the average age of the class beco...
