? = x 〖(8/5)〗^2x × 〖(5/8)〗^(3x-3)= 5/8 ⇒ 〖(5/8)〗^(-2x) × 〖(5/8)〗^(3x-3)= 5/8 ⇒ (5/8)^(-2x+3x-3) = 5/8 ⇒ (5/8)^(x-3) = 5/8 ⇒x-3=1 ⇒x=4
The average weight of a group of five persons, A, B, C, D, and E is 70 kg. If another person K joins the group then the average weight of the group is d...
Consider a group consisting of 16 females with an average age of 25 years and 20 males with an average age of 35 years. What is the approximate average ...
Average marks scored by Vineet in five subjects are 85. The average marks scored by him (excluding his highest and lowest marks) are 65 and lowest marks...
The average of four numbers is 90. Two of the numbers are equal (not least), and 40 more than the least number. If the 4th number is five times the leas...
Rohit Sharma scores 93 runs in his 23rd inning, due to this his average increased by 3 runs. Find his current average?
The average age of three children in a family is 35% of the average of the age of father and the eldest child. The total age of the mother and the young...
The average age of 25 children and their teacher's age are 20 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average of five even numbers is 38. If we replace two of these even numbers, 88 and 92, with a single even number X, the new average decreases by 4....
There are 15 numbers such that average of first 12 numbers is 65 while the average of last five numbers is 76. Find the 12th number, if the ratio betwee...
