Math Chapter Wise

168 track questions

Math Chapter Wise subcategory

Permutation And Combination questions

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EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q81.Given that, number of points on a circle is n. The number of triangles joining these points is 84, then n is equal to–

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q82.Given set { { { } } A 2,3,4,5 = and set { { { } } B 11,12,13,14,15, Two numbers randomly are selected from each set what is probability that the sum of the numbers equal 16?

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q83.An unbiased coin is tossed five times The outcome of each toss is either a head or a tail, The probability of getting at least one head is–

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q84.The probability that a student knows the correct answer of a multiple choice question is 2, 3 lf the student does not know the answer, then the student guesses the answer, The probability of the guessed answer being correct is 1 4, Given that the student has answered the question correctly, the conditional probability that the student known the correct answer is–

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q85.Two events A and B occur with probabilities 0.25 and 0.50. The proability that they occur simultaneously is 0.14 what is the probability that neither of them occur?

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q86.From a group of 5 boys and 3 girls, three persons are chosen at random, Find the probability that there are more girls than boys–

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q87.In a class of 60 students, 25 students play cricket and 20 students play tennis and 10 students play both the games then the number of students who play neither is–

EnglishJDD-75-PGT TIER II-X-15 28.06.2015

Q88.A box contains 100 bulbs, out of which 10 are defective. A sample of 5 bulbs is drawn. The probability that none is defective is–

EnglishTGT 2001

Q89.A person draws a card from a deck of cards and put it back in that deck. He keeps on doing this action untill he gets the spade card. If he fails to get a spade the first two times. What is the probability that he will get a trump card the third time?

EnglishTGT 2001/PGT 2000 & 2005

Q90.How many sides will be there in a polygon whose number of diagonals is 44?

EnglishTGT 2001

Q91.If n n 3 6 3 C: C 33:4 − = then n =?

EnglishTGT 1999

Q92.A man's hit on a target there probability is 3 4 that he tries 5 times then what is the probability that he hits the target at least three times?

EnglishTGT 1999

Q93.If the probability of occurrence of an event is 2 7. What is the probability that the event will not occur?

EnglishTGT 1999

Q94.How many different words can be formed from that letters of the word "SCHOLAR", when the first letter in each word is S and the last letter is R?

EnglishTGT 1999

Q95.What is the probability of getting an even number or a number divisible by 3 in a single throw of a dice?

EnglishPGT 2011

Q96.A bag contain 5 black and 4 white socks. A man pulls out two socks. The probability that they are of the same colour is:

EnglishPGT 2013

Q97.Two dice are thrown simultaneously, then on both the dice. What is the probability that the sum of the following number is 7?

EnglishPGT 2011, 2013

Q98.If 120 = n n r r p C them what is the value of 'r'?

EnglishPGT 2010

Q99.A survey shows that 63% Indians like coffee where as 76% like tea. If x% of the Indians like both coffee and tea, then

EnglishPGT 2010

Q100.If 1 36, 84 − − = n n r r C C and 1 126 + + = n r C then

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