GATE Practice Question and Answer
8Q: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2068 05b5cc6a9e4d2b4197774cef6
5b5cc6a9e4d2b4197774cef6- 12/3true
- 21/8false
- 33/8false
- 43/4false
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Answer : 1. "2/3"
Explanation :
Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23
Q: Which of the following is not a compound? 2066 05b5cc68ee4d2b4197774c3c1
5b5cc68ee4d2b4197774c3c1- 1Brasstrue
- 2Quick limefalse
- 3Marblefalse
- 4Soda ashfalse
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Answer : 1. "Brass"
Explanation :
Answer: A) Brass Explanation: Among the given options Brass is not a compound. Since it is an alloy, it is a mixture. The smallest part of a compound is called a molecule. It has a unique composition that is always the same. Compound is a substance that consists of two or more elements.
Q: Solve the MathPuzzle Challenge ? 2065 05b5cc6c6e4d2b4197774ddff
5b5cc6c6e4d2b4197774ddff- 14!false
- 25!false
- 36!false
- 4Can't be determinedtrue
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Answer : 4. "Can't be determined"
Explanation :
Answer: D) Can't be determined Explanation: NUMERICAL has 9 positions in which 2, 4, 6, 8 are even positions. And it contains 5 consonents i.e, N, M, R, C & L. Hence this cannot be done as 5 letters cannot be placed in 4 positions. Therefore, Can't be determined.
Q: 25 : 37 :: 49 : ? 2064 05b5cc632e4d2b4197774b9a9
5b5cc632e4d2b4197774b9a9- 165true
- 269false
- 379false
- 481false
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Answer : 1. "65"
Explanation :
Answer: A) 65 Explanation: Here the given numbers are related in such a manner that, 52 = 255+12 + 1 = 37Similarly, 72 = 497+12 + 1 = 64 + 1 = 65 Hence, 25 : 37 :: 49 : 65.
Q: There are 3 bags, in 1st there are 9 Mangoes, in 2nd 8 apples & in 3rd 6 bananas. There are how many ways you can buy one fruit if all the mangoes are identical, all the apples are identical, & also all the Bananas are identical ? 2063 05b5cc705e4d2b4197774f253
5b5cc705e4d2b4197774f253- 123true
- 2432false
- 322false
- 4431false
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Answer : 1. "23"
Explanation :
Answer: A) 23 Explanation: As in this problem , buying any fruit is different case , as buying apple is independent from buying banana. so ADDITION rule will be used. C19+C18+C16 = 23 will be answer.
Q: Which of these illustrates the Secondary Structure of a Protein? 2063 05b5cc6abe4d2b4197774d02a
5b5cc6abe4d2b4197774d02a- 1Afalse
- 2Btrue
- 3Cfalse
- 4Dfalse
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Answer : 2. "B"
Explanation :
Answer: B) B Explanation: The Secondary Structure of a Protein is option B) The Secondary Structure of a Protein results from Hydrogen Bonds.
Q: If 25% of a number is subtracted from a second number, the second number reduces to its four-sixth. What is the ratio of the first number to the second number ? 2062 05b5cc6dee4d2b4197774ea46
5b5cc6dee4d2b4197774ea46- 14:3true
- 22:3false
- 33:2false
- 45:3false
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Answer : 1. "4:3"
Explanation :
Answer: A) 4:3 Explanation: Let the numbers be p & q q-p/4 = 4q/6 => q-4q/6 = p/4 => 2q/6 = p/4 => p/q = 4/3
Q: Study of fishes is called 2062 05b5cc67be4d2b4197774c1db
5b5cc67be4d2b4197774c1db- 1Amphiologyfalse
- 2Phylumologyfalse
- 3Zoologyfalse
- 4Ichthyologytrue
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Answer : 4. "Ichthyology"
Explanation :
Answer: D) Ichthyology Explanation: Ichthyology is the branch of biology devoted to the study of fish. It is also known as Fish science which includes bony fishes (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).