Directions: Read the following information to answer the question.
Solution:
n(1/12+1/16)=28n/192
⇒ Left capacity =1–28n/192
This is filled by A in 5 min and fills 1/12 in 1 min
⇒ (192−28x)/192=5/12
⇒ n= 4 min
Directions: Read the following information to answer the question.
Solution:
In 1 day Pankaj and Bharti together produce =1/15+1/12=3/20 units
In 20 days, together they can produce (3/20)20=3 units.
From which they can fetch Rs 270
Efficiency of Bharti/Efficiency of pankaj=15/12=5/4
⇒ Share of Bharti is (5/9)270= Rs 150
Directions: Read the following information to answer the question.
30 m + 5 sec is equivalent to 50m + 1 sec. Since it is to be covered by B.
Therefore , 50m – 30m = (5s -1s) VelocityB
VelocityB = 20m/4s = 5m/s
Suppose first toss is A, second is B. We know that p(A_heads) = 50% and that p(B_tails) = 50%. Also, A and B are independent. So, p(A_heads and B_tails) = p(A_heads) * p(B_tails) = 50% * 50% = 25% = 1/4. Answer is C.
Total number of 5 lettered words that can be formed using 10 letters, with repetition = 105
total number of 5 lettered words that can be formed using 10 letters, such that the all letter used are
distinct = 10 × 9 × 8 × 7 × 6 = 30240.
Total words that have atleast one letter repeated
= 105 – 30240
= 69760.