Question
Average of 8 numbers is 30. If average of first four and
last two numbers is 20 and 50, respectively then find the fifth number given that ratio of fifth and sixth number is 7:5, respectively.Solution
Let fifth and sixth numbers be ‘7x’ and ‘5x’, respectively. So, 7x + 5x = 30 × 8 – 20 × 7 – 50 × 5 = 60 Or, 12x = 60 Or, x = 5 So, fifth number = 5 × 7 = 35
What is the position of P with respect to her sister?
Who among the following are immediate neighbours of H?
Who sits between A and D?
Who among the following sits fourth to the right of P?
How many persons sitting between I and H?
How is O related to K?
Whose income is the second highest?
If all the persons are made to sit in alphabetical order in a clockwise direction with respect to A, then how many persons remain unchanged in their po...
Who among the following is an immediate neighbor of B?
How many girls are sitting between the one who uses Acer laptop and Geet in anticlockwise direction from the one who uses Acer laptop ?
Relevant for Exams:
