The average of twelve numbers is 45.5. The average of the first four numbers is 41.5 and that of the next five numbers is 48. The 10th number is 4 more than the 11th number and 9 more than the 12th number. What is the average of the 10th and 12th numbers?
Average of 12 numbers = 45.5 Sum of 12 numbers = 45.5 × 12 = 546 Average of first 4 numbers = 41.5 Sum of first 4 numbers = 41.5 × 4 = 166 Average of next 5 numbers = 48 Sum of next 5 numbers = 48 × 5 = 240 Sum of 10th, 11th and 12th number = 546 – 166 – 240 = 140 Let the 10th number be x. 11th number = x – 4 12th number = x – 9 According to the question, => x + x – 4 + x – 9 = 140 ⇒ 3x – 13 = 140 ⇒ 3x = 140 + 13 ⇒ 3x = 153 ∴ x = 153/3 = 51 Average of 10th and 12th number = (51 + 51 – 9)/2 = 93/2 = 46.5
Which is used in the control of water hyancinth
A sandy soil contains:
Chenopodiaceae is the family of:
In the Union Budget 2023–24, Smt. Nirmala Sitharaman, the Union Finance Minister, introduced a new innovative programme called the Amrit Darohar Schem...
Which one of the following is PMFBY Exclusion?
The leading agency in the implementation of e-NAM is
What is the term for slowing down the growth of a bud by making an incision below it?
Technology in which plants are grown without soil is known as:
What is a thigmo response?
Which of these is included in the mental process of acceptance or rejection of a new product?