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Let the number of biology, chemistry and physics books be B, C and P. B+C+P =300×3=900 B+C+P=900 … (1) Biology books =150+Average number of (C and P) B=150+(C+P)/2 2B=300+C+P 2B-C-P=300 … (2) Physics books =Average of (B+C)/2 -150 P=B+C)/2 -150 2P=B+C-300 B+C-2P=300 … (3) Adding Equation (1) and (3) and subtracting (2) ... (B+C+P) + B+C-2P -2B+C+P=900+300-300 3C=900 C=300.
If 30% of the TV sold by shopkeeper S and 25% of the refrigerator sold by shopkeeper S are defective, then find the total number of non-defective items ...
If the number of butter cookies baked on Wednesday are increased by 5/16 and there are two types of butter cookies baked on Wednesday (chocolate and van...
The AC in the Store B is approximately what percent of the Refrigerators in the Store F?
Total sale of store on Thursday by selling Levis T-shirts is Rs.27000. If per unit price of Puma T-shirts is 15% more than that of Levis T-shirts, then ...
Find ratio of number of students participated in sports B and C together in 2011 to number of students participated in sports A and E together in 2012.
If 40% of the NIVEA moisturizers sold on Thursday got damaged, then find the number of non-damaged NIVEA moisturizers sold on the same day.
What is the difference between the number of chocolates purchased by Amit from shop A and B together and number of chocolates purchased by Sumit from sh...
If half of the umbrellas not sold in city A, then find the difference between the numbers of umbrellas sold in city A and city E.
Find the average of the number of all the pens sold by D.