A. 3 : 2
B. 3 : 4
C. 3 : 5
D. 4 : 5
✅ The correct answer is option A. 3 : 2.
198. A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.
A. 6/63
B. 2/63
C. 125/126
D. 1/126
✅ The correct answer is option C. 125/126.
If there is a total of 104 weekly instalments and a third deposit, find the interest charged
A. 237.55
B. 337
C. 443
D. 334
✅ The correct answer is option A. 237.55.
Cash price = $3695
Cash price = $3695
Deposit =1/3 of $3695
A rectangular field has dimensions 25m by 15m. Two mutually perpendicular passage of 2m width have been left in it’s central part and grass has been grown in rest of the field. The area under the grass is____________?
A. 295m2
B. 299m2
C. 300m2
D. 375m2
✅ The correct answer is option B. 299m2.
228. In a series of six consecutive even numbers, the sum of the second and sixth numbers is 24. What is the fourth number?
A. 8
B. 12
C. 6
D. 14
✅ The correct answer is option B. 12.
The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is____________?
A. Rs. 3500
B. Rs. 4000
C. Rs. 4050
D. Rs. 5000
✅ The correct answer is option B. Rs. 4000.
224. 3 men and 7 women can complete a work in 10 days . But 4 men and 6 women need 8 days to complete the same work . In how many days will 10 women complete the same work?
A. 50
B. 30
C. 40
D. 13
✅ The correct answer is option C. 40.
Work done by 4 men and 6 women in 1 day = 1/8
Work done by 4 men and 6 women in 1 day = 1/8
Work done by 3 men and 7 women in 1 day = 1/10
Let 1 man does m work in 1 day and 1 woman does w work in 1 day. The above equations can be written as
4m + 6w = 1/8 —(1)
3m + 7w = 1/10 —(2)
Solving equation (1) and (2) , we get m=11/400 and w=1/400
Amount of work 10 women can do in a day = 10 × (1/400) = 1/40
Ie, 10 women can complete the work in 40 days
222. One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in?
A. 81 min
B. 108 min
C. 144 min
D. 192 min
✅ The correct answer is option C. 144 min.
220. The ratio of the prices of three different types of cars is 4:5:7. If the difference between the costliest and the cheapest cars is Rs. 60000 the price of the car of modest price is:
A. Rs. 80000
B. Rs. 100000
C. Rs. 140000
D. Rs. 120000
✅ The correct answer is option B. Rs. 100000.
218. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill cistern. How much time will be taken by A to fill the cistern separately?
A. 1 hr
B. 2 hrs
C. 6 hrs
D. 8 hrs
✅ The correct answer is option C. 6 hrs.