In a class 80% have passed english,70% passed hindi, 10%
didnot passed either.If 144 students passed both. What is the
total strength of the class
- 2 Answers
- 4513 Views
- I also Faced
- E-Mail Answers
Answer Posted / ravi
union defined as U
intersection defined as n
A U B = 144
A + B - (A n B)= (A U B)
0.8x +0.7x -144 = x
1.5x - 144 = x
1.5x - x =144
0.5x = 144
x = 288
So, total strength is 288
| Is This Answer Correct ? | 11 Yes | 4 No |
Post New Answer View All Answers
Find sum of 3 + 5/(1+22) + 7/(1 + 22 + 32) + ......
A man travelled from the village to the post-office at the rate of 25 kmph and walked back at the rate of 4 kmph. If the whole journey took 5 hours 48 minutes, find the distance of the post-office from the village
Two cyclists start biking from a trail's start 3 hours apart. The second cyclist travels at 10 miles per hour and starts 3 hours after the first cyclist who is traveling at 6 miles per hour. How much time will pass before the second cyclist catches up with the first from the time the second cyclist started biking
A worker pay Rs20 a day ,he works 1,1/3,2/3,1/8,3/4 in a week.What is the total amount paid to the worker.
Denominator is 4 greater than numerator if 10 is added to Denominator,the fraction becomes 1/8.what is the fraction.
3 persons say these statements. A says either Democratic or liberal wins the elections. B says Democratic wins.C says neither democratic nor liberal wins the election.of these only one is wrong.who wins the election?
Perimeter of the back whell = 9 feet, front wheel = 7 feet on a certain distance the front wheel gets 10 revolutions more than back wheel . what is the distance?
In a typical motor cycle rally, every motor cycle has to reach a speed of 20 m/min within a minute and it increase its speed by 20 m/min and the sum was 1600 m/min. Four minutes later, a new motor cyclist started running in the race. After another two minutes, the motor cyclist with the speed of 400 m/min stopped due to injuries and again two new motor cyclist started running in the race. What is the current average speed?
A person went to shop and asked for change for 1.15 paise. But he said that he could not only give change for one rupee but also for 50p, 25p, 10p and 5p. What were the coins he had ?
A Lorry starts from Banglore to Mysore At 6.00 a.m, 7.00 a.m, 8.00 a.m.....10 p.m. Similarly another Lorry on another side starts from Mysore to Banglore at 6.00 a.m, 7.00 a.m, 8.00 a.m.....10.00 p.m. A Lorry takes 9 hours to travel from Banglore to Mysore and vice versa.?
There's a camel living in a desert. There is a market 1000 miles away. The camel has 3000 dates for sale. It has to take the date to the market. But for that hte camel eats one date per mile. How many dates the camel can trade?
When the angle a, b, c, d are given find ‘x’?
if length of a rectangle is increased by 20% and width is decreased by 20% the area will be
One man brought pen and book from 250 and he sold both at 10% profit on pen and 20% loss on book and finally he gained 40% what is the value of pen
In a lock of 4 rings there r five characters how many unsuccessful attempts can be made ?
