Wipro Aptitude Questions and Answers for Freshers 2024

 Answer : Option B

Explanation :

Solution 1
Total number of outcomes possible when a coin is tossed = 2 (∵ Head or Tail)
Hence, total number of outcomes possible when 5 coins are tossed, n(S) = 2⁵

E = Event of getting exactly 2 heads when 5 coins are tossed
n(E) = Number of ways of getting exactly 2 heads when 5 coins are tossed = ⁵C₂

P(E) = n(E)/n(S)=⁵C_2/2⁵= 5/16 .

Let P = Rs.100

Simple Interest = Rs. 80 ( ∵ 80% increase is due to the simple interest)

Now let's find out the compound interest of Rs. 14,000 after 3 years at 10%

P = Rs.14000

T = 3 years

R = 10%

Amount after 3 years =P(1+R/100)^T=14000(1+10/100)³=14000(110/100)3=14000(11/10)³=14×113=18634

Compound Interest = Rs.18634 - Rs.14000 = Rs.4634

Answer : Option C

Explanation :

Amount of work P can do in 1 day = 1/20

Amount of work Q can do in 1 day = 1/30

Amount of work R can do in 1 day = 1/60

P is working alone and every third day Q and R is helping him

Work completed in every three days = 2 × (1/20) + (1/20 + 1/30 + 1/60) = 1/5

So work completed in 15 days = 5 × 1/5 = 1

Ie, the work will be done in 15 days

Answer:Option D

Explanation:

Let Cost Price(CP) of 1 litre spirit be Rs.1

Quantity of spirit in 1 litre mixture from vessel A $=\frac{5}{7}$
Cost Price(CP) of 1 litre mixture from vessel A = Rs. $=\frac{5}{7}$

Quantity of spirit in 1 litre mixture from vessel B $=\frac{7}{13}$
Cost Price(CP) of 1 litre mixture from vessel B = Rs. $=\frac{7}{13}$

Quantity of spirit to be obtained in 1 litre mixture from vessel C $=\frac{8}{13}$
Cost Price(CP) of 1 litre mixture from vessel C(Mean Price) = Rs. $=\frac{8}{13}$

By rule of alligation,

=> Mixture from Vessel A : Mixture from Vessel B
$=\frac{1}{13}:\frac{9}{91}=7:9$

Answer: Option D

Explanation:

Speed of the boat in still water = 12 km/hr

Speed downstream $=\frac{\mathrm{45/}}{3}$ = 15 km/hr

Speed of the stream = 15-12 = 3 km/hr

Speed upstream = 12-3 = 9 km/hr

Time taken to cover 45 km upstream $=\frac{\mathrm{45/}}{9}$ = 5 hours

Answer: Option D

Explanation:

Average of 20 numbers = 0

=> $\frac{\text{Sum of 20 numbers}}{20}=0$

=> Sum of 20 numbers = 0

Hence at the most, there can be 19 positive numbers.
(Such that if the sum of these 19 positive numbers is x, 20th number will be -x)