Question
The average height of each student in a class of 30
students is 100 cm. If 6 new students joined the class, then the average height of the each student in the class increases by 3 cm. Find the average height of 3 new students who joined the class.Solution
Total height of 30 students of the class = 100 × 30 = 3000 cm When 6 new students joined the class, average height of each student = 100 + 3 =103 cm Total height of 36 students of the class = 103 × 36 = 3708 cm Average height of 6 new students who joined the class = {(3708 – 3000)/6} = 708/6 = 118 cm
Five teachers, A, B, C, D and E, are sitting in a straight line facing towards north. E is between A and D. C is second to the right of D. A is to the i...
Who amongst the following teaches Sanskrit?
The Person who likes Mango in the row arrangement sits which of the following place in the circular arrangement?
Which of the following replaces blank ___(4)___?
Which of the following statement is true?
Number of person sits between C and Z when counted from the left of C is same as Number of person sits between Y and ______ when counted from right of ...
Five people, H, I, J, K, and L, are sitting in a straight row, facing north. I sits to the immediate left of K. Only three people sit between J and L. H...
If Jaspreet is an immediate neighbor of Jasbir then who among the following likes Black?
Who among the following person sits second to the left of the one whofacing O?
Houses of six persons U, V, W, X, Y and Z are situated in two rows of three houses each sitting opposite to each other. X's house is diagonally opposite...
