Question
The average of 27 numbers is 20.The average of first 13
numbers is 15 and that of the last 13 numbers is 18. What will be the 27th number?Solution
Sum of 27 numbers = 27 × 20 = 540 Sum of first 13 numbers = 13 × 15 = 195 Sum of last 13 numbers = 13 × 18 = 234 Therefore, 27th number = 540 – (195 + 234) = 111
Consider the following pairs:
Which of the pairs give...
Which of the following are reasons for frequent floods in regions surrounding Assam?
1. Brahmaputra River unloads huge sediment in the region bro...
Which of the following statement(s) support the hypothesis that the Himalayan region is still tectonically active?
1. The Himalayas are continuin...
Which of the following Indian state has the largest coastline?
Among the following cities, which one lies on a longitude closest to that of Delhi?
In India, in which one of the following types of forests is teak a dominant tree species?Â
Which of the following pair of mountain passes and the states/UTs they are located in, are correctly matched?Â
Study of Science of rocks which form the unit of earth crust is known as ?
All Weather related phenomena take place in which layer of atmosphere?
In which layer of the atmosphere does most weather occur?
Relevant for Exams:
