Question
The average of 12 numbers is 48. The average of the
first 5 numbers is 45 and the average of next 4 numbers is 52. If the 10th number is 10 less than the 11 th number and is 5 more than the 12th number, then the average of the 11 th and 12th numbers is:Solution
Average of 12 numbers = 48 → Sum = 576 Average of first 5 numbers = 45 → Sum = 225 Average of next 4 numbers = 52 → Sum = 208 Let 10th number = x, 11th number = x + 10, 12th number = x − 5 225 + 208 + 3x + 5 = 576 3x + 438 = 576 ⟹ x = 46 11th number = 56, 12th number = 41 Average = (56 + 41)/2 = 48.5
Which among the following is categorized as a Mediterranean poultry breed?
The isolation distance for the production of foundation seed in bajra is:
Which one of the following soil type will have maximum soil erodibility factor?
What is the primary role of organic matter in soil?
Name the alkaloid that is obtained from the autumn crocus, which is the most important chemical used by breeders to induce the doubling of chromosome nu...
In germination test the commonly used term B P stands for:
Which of the following is considered as an essential step in the exchange of gases during respiration and photosynthesis?
What is the tag color of certified seed?
Which process describes the mixing of soil by earthworms?
Leaf curl disease of cotton is due to
Relevant for Exams:
