Related Questions

In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?
A 40
B 50
C 70
D 90
If A has 4 elements and B has 8 elements then the minimum and maximum number of elements in A∪B are respectively __
A 4,8
B 8,12
C 4,12
D 6,12
Karim has exactly 3 times as many Bangladesh as non-Bangladesh stamps in his collection . Which of the following cannot be the number of stamps in Karim's collection ?
A 54
B 72
C 80
D 96
In Sajib's collection, Bangladeshi stamp is 3 times more than the stamps of other countries . Which of the following cannot be the number of stamps in Sajib's collection ?
A 96
B 72
C 54
D 32
Pallab has exactly 3 times as many Bangladeshi as non- Bangladeshi stamps in his collection. Which of the following cannot be the number of stamps in Pallb's collection?
A 54
B 68
C 96
D 72
The number of stamps in Ziko's collection is 75% of the number in Pallab's collection. If Pallab has 80 more stamps than Ziko, how many stamps do they have altogether?
A 320
B 240
C 560
D 620
The number of marbles in Amin's collection is 80% of the number in Rahim's collection. If Rahim has 80 more marbles than Amin, how many marbles do they have altogether ?
A 720
B 120
C 135
D 400
In a sample of 50 people, 19 had type O blood, 22 had type A blood, 7 had type B blood and 2 had type AB blood. If a person is selected randomly, find the probability that the person has neither type A nor type O blood?
A 15/25
B 31/50
C 11/25
D 9/50
Type 1 workers can do three times the work of Type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 8 Type 2 workers to complete the same task?
A 16
B 17
C 20
D 18
Which of the following is an unordered collection of elements that may contain duplicates?
A Set
B Bag
C List
D Dictionary

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