A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

Number System
A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

28/144

29/145

30/146

27/143

28/144

29/145

30/146

27/143

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Number System
The sum of 8 consecutive odd numbers is 656. Also average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number ?

163

167

158

160

163

167

158

160

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Number System
A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

18

24

42

81

18

24

42

81

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Number System
On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

43

47

45

41

43

47

45

41

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Number System
What should come in the place of question mark (?) in the number series given below?

157

160

158

159

157

160

158

159

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Number System
Which one of the following represents the sum of the first n even numbers?

N(N – 1)

N2+ 1

N2

N(N + 1)

N(N – 1)

N2+ 1

N2

N(N + 1)

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Number System

Number System A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

Number System The sum of 8 consecutive odd numbers is 656. Also average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number ?

Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

Number System On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

Number System What should come in the place of question mark (?) in the number series given below?

Number System Which one of the following represents the sum of the first n even numbers?

Number System
A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

Number System
The sum of 8 consecutive odd numbers is 656. Also average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number ?

Number System
A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

Number System
On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

Number System
What should come in the place of question mark (?) in the number series given below?

Number System
Which one of the following represents the sum of the first n even numbers?