Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is -.
A. 5/9
B. 5/12
C. 1/36
D. 7/12
Explanation:
Using question number 11 and 12, we get the probability as
1 – (1/36 + 5/9) = 5/12
A. 5/9
B. 5/12
C. 1/36
D. 7/12
Explanation:
Using question number 11 and 12, we get the probability as
1 – (1/36 + 5/9) = 5/12
A. Rs.17684
B. Rs.1684
C. Rs.2522
D. Rs.3408
Explanation:
A = 1600(21/20)3 = 2522
A. 3 hrs.
B. 4 hrs,
C. 5 hrs.
D. 6 hrs.
X’s 1 hour work = 1/10
Y’s 1 hour work = 1/15
(x+y)’s 1 hour work = 1/10+1/15=5/30=1/6
Both the taps can fill the tank in 6 hrs.
A. 20
B. 18
C. 32
D. 20
Explanation by Fahad Maqsood Akhtar:
20kg / 3days = 6.6666 (per day rice quqntity)
6.6666 / 18men = 0.3703 (rise for one man)
Now further is:
0.3703 * 6men = 2.2218 (rice for 6 men)
2.2218 * 18(ANS) = 40kg
Explanation by Zeeshan:
6 men is 3x less than 18 men. So it would take the 6 men 3x as long to eat the 20kg. Meaning 9 days. 40kg is double the amount, so it would take them twice as long, meaning it would take 18 days.
Explanation by NAEEM ULLAH:
formula
(men)(days)/food=x
now
(2nd given food)/x/(2nd given men)
Explanation by NAEEM ULLAH:
18*3/20=6/40x
54/20=6/40x
54*40/20*6=x
18=x
Explanation by Muddasir Khan:
It is easy bro find how many days will take 6 men to eat 20kg of rice. You will get 9 days. Now since we have asked for 40kg of rice then the remaining 20kg of rice will also take 9 days . in this way the answer is 18
A. 60%
B. 50%
C. 45%
D. 40%
Explanation:
Male = 45,000* 5/9 = 25,000
Female = 45,000* 4/9 = 20,000
Married Male = 25,000* 40/100 = 10,000
Married Female = 10,000
20,000 ———— 10,000
100 ————- ? => 50%
A. 5
B. 5.5
C. 6.5
D. 6
Sum of 10 natural no. = 110/2 = 55
Average = 55/10 = 5.5
A. 28 4/7 years
B. 31 5/7 years
C. 32 1/7 years
D. None of these
Explanation:
Required Average = [(67 * 2) + (35 * 2 ) + (6 * 3)]/(2 + 2 + 3)
= (134 + 70 + 18)/7 = 31 5/7 years.