Question
Which of the following is a constituent element of
chlorophyll ?Solution
The main constituent element of chlorophyll is Magnesium.
The average of n numbers is 64. If each of 56% of the numbers is increased by 15 and each of the remaining numbers is decreased by 10, then the n...
Determine the value of a − b given that a + 3b = 18a and 3a + b = 30 .
Out of 6 numbers, the sum of the first 5 numbers is 7 times the number. If their average is 136, then the 6th number is:
The average age of a group of 10 friends is 27 years. If one friend leaves the group, the average becomes 25years. Find the age of the friend who left t...
In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average ...
The average of four numbers (z+16), (y+15), (y-25) and 1.2z is (y-6). If one more number which is 144 is added then the new average will be (y-1). The v...
Of the four numbers, whose average is 75, the first is one-fourth of the sum of the last three. The first number is
The average age of (x + 7) trainees is 17 years. When a 39-year-old trainer joins, the average becomes 18 years. Find x% of 500.
- The average of fifty numbers is 55 while the average of first twenty-five numbers and last twenty-five numbers is 60 and 70, respectively. Find the twenty-...
In an Aerobic class, the average age of all the members was 54.5 years, 11 members left the class and 7 new members joined. If the average age increased...
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