Question
Who is credited with the discovery of
penicillin?Solution
Alexander Fleming discovered penicillin in 1928. It was the first widely used antibiotic and revolutionized medicine.
The average marks obtained by a student in a certain number of tests is 36. His average increases by 2 when he scores 90 in his next test. Find the tota...
The average of first two numbers and last two numbers of a set of six numbers is 70 and 45 respectively. If the overall average of all six numbers is 65...
The average monthly expense of a family of 5 is ₹25,000. If the highest earning member moves out, the average drops to ₹20,000. Find the monthly exp...
[123 ÷ 8 ÷ 9] × 144 = ? + 12 × 5
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18 years ago the average age of a family of four members was 45 years. Two children were born in that span of 18 years. The present average age of the ...
The average weight of 30 students in a class increases by 0.5 kg when the weight of the principal is included. If earlier the average weight of the stud...
There are only 220 students living in hostel. If 20 students left hostel, then overall expenditure of mess is reduced by Rs. 800 weekly but per student ...
The average age of 6 sisters is 30 yr. If the age of the youngest sister be 5 yr. What was the average age of the group of sister just before the birth ...
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