Question
Which of the following statements is/are related to
ecosystem? (i) It consists of biotic components comprising living organisms. (ii) All green plants and certain bacteria are producers. (iii) Decomposers break-down complex organic into simple organic substance.Solution
The correct answer is B
In a school club, the ratio of juniors to seniors is 3:2. The average score of all seniors is (x − 2) and the average score of all members is (x + 4)....
Fifteen movie theatres average 600 customers per theatre per day. If six of the theatres close down but the total theatre attendance stays the same, the...
Three natural numbers are given. If sum of average of any two numbers and the remaining third number is 56, 46 and 50 respectively, then find the sum o...
The average mark obtained by 110 candidates in a certain examination is 45. If the average marks of passed candidates are 50 and that of the failed cand...
- The average age of (x + 6) students is 14 years. When a 36-year-old principal joins, the average age increases by 1 year. Find x% of 500.
Average run scored by a batsman in 20 innings is 60. In next 6 innings, he scored runs with an average of ‘x’ so that his overall average increases ...
The average of six numbers is 82. When two more numbers are included, the average increases by 4. Find the average of the numbers included.
The average age of A and B is 21 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 22 years. Find the age...
- The average of six numbers is 54. When two more numbers are included, the average increases by 3. Find the average of the numbers included.
Find the average of prime numbers between 50 and 70.
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