Question
If 'P' stands for '+', 'Q' stands for '×', 'R' stands
for '-', and 'S' stands for '÷', then what is the value of the following expression? 64 S 8 P 7 R 10 P (8 Q 6 R 4) P 9Solution
64 ÷ 8 + 7 - 10 + (8 × 6 - 4) + 9 8 + 7 - 10 + (48 - 4) + 9 8 + 7 - 10 + 44 + 9 = 58.
The average age of a group of 10 students is 30 years. Two persons of age 40 years and 35 years, left the group and 2 persons of age 50 years and 95 yea...
Sum of ages of 80 people is 1600 years. The average age of 30 of them is 18 years and average age of another 30 of them is 14 years. Find the average a...
The average age of a group of persons going for tour to Shimla is 22 years. 25 new persons with an average age of 10 years join the group and their aver...
A man takes 3.5 hours to reach a friend's house, which is 50 km away from his residence. He returns home traveling at 20 km/h. Ca...
In a company, the average age of 40 employees is 20 years. When the ages of two managers, one 'a' years old and the other 'a + 10' years old, are includ...
In a gathering of 30 guests, the average age of each guest in the class is 21 years. Later, 4 more guests join the party, causing the average age of the...
How many identical spherical marbles having a diameter of 4 cm can be made by melting a hemisphere of radius 28 cm? (Use π = 22/...
- The average of two consecutive even numbers is 67. If the smaller number is increased by 35% and the larger number is decreased by 35%, then find the diffe...
What is the average of the squares of the first 47 natural numbers?
The average score of a student increased by 5 marks when he scored 210 marks in his 60th test. Find the average score of the student after 60 tests.
Relevant for Exams:
