Question
Which of the following scientists are credited with the
discovery and understanding of the excretory role of Malpighian tubules in insects?Solution
The combined work of Malpighi, Herold, and Meckel contributed to our understanding of insect excretory physiology.
The average weight of 4 persons is 30 kg. The heaviest person’s weight is 24 kg more than the lightest person’s weight. If the average weight of the...
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 age of 23 children and their teacher's age are 21 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average score of a class of boys and girls in examination is X. The ratio of boys and girls in the class is 4:3. If the average score of the boys (X...
Average run scored by a batsman in first ‘x’ matches is 41. In next 12 matches he scored runs with an average of 61 so that his overall average incr...
- There are three distinct numbers ‘x’, ‘y’ and ‘z’. If, x = 180, (x + y) = 480 and (z – y) = 60, then find the average of x, y and z.
What is the average of the squares of the first 35 natural numbers?
The average expenditure of Mr. Sharma for January to June is Rs. 4200 and he spent Rs. 1200 in January and Rs. 1500 in July. The average expenditure for...
There are three distinct numbers ‘p’, ‘q’ and ‘r’. If, p = 160, (p + q) = 460 and (r – q) = 80, then find the average of p, q and r.
...The average income of 'Pawan', 'Qureshi,' and 'Ranjan' is Rs. 'y', and their incomes are in the ratio of 5:3:4, respectively. 'Pa...
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