Question
The insect which is known to transmit ‘Grassy stunt
virus disease’ in rice crop:Solution
Rice grassy stunt virus is transmitted by the brown planthoppers Nilaparvata lugens.
The average of 5 numbers is 24. If one number is removed, the average of the remaining 4 numbers becomes 21. Find the number that was removed.
The average weight of 4 persons is 33 kg. The heaviest person’s weight is 30 kg more than the lightest person’s weight. If the average weight of the...
Average of 10 positive integers is calculated as 36. It was later found that while calculating the average, someone mistakenly entered 15 instead of 35...
A set contains ten numbers. The average of the first six numbers is (x − 4), and the average of the last three numbers is (x + 2). The average of the...
The average of two numbers is 6 more than the smaller number among them. If the greater number is 100% more than the smaller number, then find the sum o...
Average age of company A is 22 years and average age of both companies A and B is 14 years. If the ratio of number of employees in company A and B is 3:...
The average mark obtained by 160 candidates in a certain examination is 60. If the average marks of passed candidates are 65 and that of the failed cand...
The average of 25 numbers is 36. When a new number is added, the average becomes 37. Later, one of the original 25 numbers, which is 30, is removed from...
Average of four consecutive prime numbers R1, R2, R3, and R4 is (14 + x). If the average of R1 and R2 is (11 + x) and the average of R3 and R4 is (11 + ...
The average weight of 10 books is 5 kg. If 6 new books are added, the new average increases by 3 kg. What will be the average weight of the 6 new books?
