Question
The average height of each student in a class of 20
students is 125 cm. If 10 new students joined the class, then the average height of the each student in the class increases by 11 cm. Find the average height of 10 new students who joined the class.Solution
Total height of 20 students of the class = 125 times; 20 = 2500 cm When 10 new students joined the class, average height of each student = 125 + 11 =136 cm Total height of 30 students of the class = 136 times; 30 = 4080 cm Average height of 6 new students who joined the class = {(4080; 2500)/10} = 1580/10 = 158 cm
In the following expression find the missing term:
Select the number from among the given options that can replace the question mark (?) in the following table.
A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
18, 19, 27, 36, ___, 225
Find the missing letter.
Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
3 _ 3 _ 5 3 3 5 _ 3 3...
In the following expression find the missing term:Â Â
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First row: 10, 6, 964
Second row: 7, 3... What will come in place of question mark [?] following the same pattern as given below?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.