Math Chapter Wise

EnglishLT 2018

Q221.If ((())) ((()) 7 8 P A,P B 15 15 = and ((()) 11 P A B, 15 ∩ = then P(A/B) is

A3/8 B11/8 C7/8 D5/8

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EnglishLT 2018

Q222.A coin is thrown 6 times. The probability of getting exactly four heads is

A1/4 B3/4 C5/16 D15/64

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EnglishLT 2018

Q223.A bag contains 8 red and 5 white balls. Three balls are drawn at random. The probability that one ball is red and two balls are white, is

A40/143 B80/146 C10/296 D5/286

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EnglishDSSSB TGT (SECTION-B) 28 DEC 2014

Q224.A bag contains 6 red and 4 green balls. A ball is drawn at random from the bag. Find the probability that it is either a red ball or a green ball.

A1 B3 C1/2 D5

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EnglishDSSSB TGT (SECTION-B) 28 DEC 2014

Q225.Seven persons are to be seated in a row. The probability that two particular persons sit next to each other is–

A1/3 B1/6 C2/7 D1/2

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EnglishDSSSB TGT (SECTION-B) 28 DEC 2014

Q226.For any event E, if P(E) = 0.999, find the value of P(not E).

A0.1 B0.01 C0.001 DNone of these

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EnglishUPPSC Ashram Paddhati 2021

Q227.The probability of getting more than 15 in one throw with 3 dice is

A5/108 B21/216 C1/24 D1/27

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EnglishUPPSC Ashram Paddhati 2021

Q228.What is the probability that a leap year, selected at random, will have 53 Tuesday?

A3/7 B5/7 C2/7 D4/7

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EnglishDSSSB 23 SEP 2018 (9 AM-11 AM)

Q229.If X is a random variable with mean µ, then the variance of X is denoted by Var (x):

AVar (X) = Σ[X-µ] BVar (X) = Σ [(X-µ)2 ] CVar (X) = Σ [X2 ] – µ DVar (X) = Σ [X] – µ2

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EnglishNVS PGT 10-06-2019

Q230.Suppose a random variable X follows a binomial distribution with parameters n=6 and p. If 9P(x=4)=P(x=2), then the value of p is:

A1/3 B1 C1/2 D1/4

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EnglishTGT 2009

Q231.There are 80 students in a class in a school, out of which 50 students study mathematics, 40 study statistics and 10 study both the subjects. One student is chosen at random from them. What will be the probability that the student is statistic's student?

A1/8 B1/5 C1/3 D1/10

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EnglishPGT 2010

Q232.A and B are two independent sets then P(Ac ∩ ∩B) is equal to -

AP(A) P(B) BP(Ac/) P(B) CP(A) P(Bc/) DNone of these

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EnglishPGT 2013

Q233.If A and B are two events for which (()) 5 6 ∪ = P A B, ((())) ((()) 1 1, 3 2 ∩ = ∩ = ∩ = ∩ = P A B P B. Then, P(A) will be-

A1/3 B2/3 C−1/3 D1/6

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EnglishKVS PGT 23-12-2018

Q234.Matrices of order 3× × ×3 are formed by using the elements of the set A={–3, –2, –1, 0, 1, 2, 3}, then probability that matrix is either symmetric or skew symmetric is-

A6 3 1 1 7 7 + B9 3 6 1 1 1 7 7 7 + − C3 9 1 1 7 7 + D3 6 9 1 1 1 7 7 7 + −

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EnglishUKPSC GIC 2018

Q235.The variance of the Binomial distribution (p + q)n is

Anpq Bnp Cnq Dnp2

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EnglishUKPSC GIC 2018

Q236.The following data gives the number of years of service of 15 employees in a manufacturing company: 5, 9, 7, 6, 24, 11, 4, 13, 10, 9, 20, 8, 19, 17, 25 The range of above data is

A18 B19 C20 D21

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EnglishUKPSC GIC 2018

Q237.Which of the following is the best measure of dispersion?

ARange BMean deviation CStandard deviation DCo-efficient of variation

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EnglishUK SSSC LT 2020

Q238.The mean of binomial distribution is:

Anpq Bnp Cnpq Dnp

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EnglishUK SSSC LT 2020

Q239.The empirical relation between mean, median and mode is:

AMean – Median = 3 (Mean – Mode) BMean – Mode = 2 (Mean – Median) CMean – Median = 2 (Mode – Mean) DMean – Mode = 3 (Mean – Median)

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EnglishUK SSSC LT 2020

Q240.The difference between upper and lower limit of a class-interval is called:

AFrequency BCumulative frequency CClass – size DMid – point

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