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Q:

In a single throw of two dice , find the probability that neither a doublet nor a total of 8 will appear.

A) 7/15	B) 5/18
C) 13/18	D) 3/16

Answer & Explanation Answer: B) 5/18

Explanation:

n(S) = 36

A = {(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6)}

B = { (2, 6), (3, 5), (4, 4), (5, 3), (6, 2) }

$n (A) = 6, n (B) = 5, n (A \cap B) = 1$

$∴$ Required probability = $P (A \cup B)$

= $P (A) + P (B) - P (A \cap B)$

= $\frac{6}{36} + \frac{5}{36} - \frac{1}{36}$ = $\frac{5}{18}$

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Filed Under: Probability

Q:

In How many ways is it possible to make a selection by taking any number of 15 fruits, namely 3 oranges, 5 apples and 7 mangoes?

A) 131	B) 191
C) 68	D) 3720

Answer & Explanation Answer: B) 191

Explanation:

Out of 15 fruits, 7 are alike of one kind, 5 are alike of a second kind and 3 are alike of a third kind.

Hence, the required number of ways = [ (7+1) (5+1) (3+1) -1] =191

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Filed Under: Permutations and Combinations

Q:

Arrange the given words in a meaningful sequence.

1. Rainbow 2. Rain 3. Sun 4. Happy 5. Child

A) 4, 2, 3, 5, 1	B) 2, 3, 1, 5, 4
C) 4, 5, 1, 2, 3	D) 2, 1, 4, 5, 3

Answer & Explanation Answer: B) 2, 3, 1, 5, 4

Explanation:

The Correct Sequence is:

Rain Sun Rainbow Child Happy

2 3 1 5 4

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Filed Under: Logical Sequence of Words

Q:

LAP BUT CAR SON HID

If the positions of the first and the third alphabets of each of the words are interchanged, which of the following would form a meaningful word in the new arrangement?

A) HID	B) SON
C) Both LAP and BUT	D) Both CAR and LAP

Answer & Explanation Answer: C) Both LAP and BUT

Explanation:

When positions of first and the third alphabets of each of the words are interchanged, we have PAL TUB RAC NOS DIH

Clearly, PAL and TUB are the only meaningful words. These words are obtained from LAP and BUT respectively.

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Filed Under: Alphabet Test

Q:

If the letters in the word DOLPHIN are rearranged as they appear in English alphabetical order, which of the following letters, will be the fifth from left?

A) O	B) D
C) L	D) None of these

Answer & Explanation Answer: D) None of these

Explanation:

Arrangement of letters of the given word DOLPHIN according to the English alphabetical order is as follows:

D H I L N O P

Hence, N is the fifth letter from the left

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Filed Under: Alphabet Test

Q:

The uranium mines being develope by UCIL at Lambapur and Domiasiat are located, respectively, in which of the following states?

A) Jharkhand and Arunachal Pradesh	B) West Bengal and Assam
C) Andhra Pradesh and Meghalaya	D) Maharashtra and Sikkim

Answer & Explanation Answer: C) Andhra Pradesh and Meghalaya

Explanation:

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Filed Under: Indian Geography

Q:

Who of the following was the first scientific geographer who ascertained the length of equator on sound principles?

A) Herodotus	B) Hecataeus
C) Anaximander	D) Eratosthenes

Answer & Explanation Answer: D) Eratosthenes

Explanation:

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Filed Under: World Geography

Q:

During Pleistocene epoch, four glacial phases were identified. Which one of the following is the correct chronological order in which they appeared during this epoch from early times?

A) Gunz - Mindel - Wurm - Riss	B) Gunz - Mindel - Riss - Wurm
C) Wurm - Riss - Mindel - Gunz	D) Mindel - Gunz - Riss - Wurm

Answer & Explanation Answer: B) Gunz - Mindel - Riss - Wurm

Explanation:

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Filed Under: World Geography

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