Start learning 50% faster. Sign in now
Let the quantities of mixtures 'X', 'Y', and 'Z' in the final mixture be 3a, 5a, and 2a, respectively. Now, calculate the amount of milk in each mixture: Milk in 'X' = (4/9) × 3a = (12a/9) = (4a/3) Milk in 'Y' = (2/5) × 5a = (10a/5) = 2a Milk in 'Z' = (3/7) × 2a = (6a/7) Total amount of milk = (4a/3) + 2a + (6a/7) LCM of 3 and 7 = 21, so: (4a/3) = (28a/21), (2a) = (42a/21), (6a/7) = (18a/21) Total amount of milk = (28a + 42a + 18a) / 21 = (88a/21) Now, calculate the total quantity of the final mixture: Total mixture = 3a + 5a + 2a = 10a The concentration of milk = (Total amount of milk / Total mixture) × 100 = (88a/21) / 10a × 100 = (88/210) × 100 = 41.90% ≈ 42% Correct option: b
There are 15 natural numbers whose average is 30.6. The average of the first 8 numbers is 28, and the average of the last 8 numbers is 33. Find the eigh...
A person purchased diesel at Rs. 7, Rs. 10 and Rs. 12 per litre in three successive years. If he spent Rs. 2520 each year on diesel, then find the appro...
In an examination, Aryan scored 54% marks and passed by 98 marks, while Rohit scored 35% marks and failed by 35 marks. Determine the passing marks for t...
In an examination, a student has an average score of 84. If he had scored 14 more marks in Science and 19 more marks in English, his average would incre...
The average price of 10 stickers is Rs.12 while the average price of 8 of these stickers is Rs.11.75. Of the remaining two stickers, if the price of one...
Average run scored by a batsman in first ‘x’ matches is 42. In next 13 matches he scored runs with an average of 62 so that his overall average incr...
In a classroom, the average score of 15 students on a test is 44 points. If 5 new students, each with an average score of 'x' points, join the class, an...
Average run scored by a batsman in first ‘x’ matches is 70. In next 12 matches he scored runs with an average of 90 so that his overa...
Find the average of all the numbers between 9 and 31, which are divisible by 5?
Average of 20 numbers is 90. Average of first 8 numbers is 103 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...