Math Chapter Wise

EnglishKVS PGT 23-12-2018

Q301.If the mean deviation about the median of the numbers a, 2a, 3a,.... 50a is 50, then |a| equals:

A5 B2 C3 D4

Show answer

EnglishKVS PGT 23-12-2018

Q302.IQ of a person is given by the formula: MA IQ 100 CA = × Where MA is mental age and CA is Chronological age. If 80 ≤ IQ ≤ 140 for a group of 15 years old children, find the range of their mental age.

A12 ≤ MA ≤ 21 B15 ≤ MA ≤ 18 C16 ≤ MA ≤ 20 D20 ≤ MA ≤ 35

Show answer

EnglishDSSSB 23 SEP 2018 (9 AM-11 AM)

Q303.For 4 data points x and y of two related variables, given that, 2 2 x 24, y 11, x 202, xy 84, y 39 Σ = Σ = Σ = Σ = Σ = x is cousidered independent fit a least squares line using this data as variables.

A() 1 x 103 36y 116 = + B() 1 y 103 36x 116 = + C() 1 x 36 103y 116 = + D() 1 x 36 103x 116 = +

Show answer

EnglishDSSSB 23 SEP 2018 (9 AM-11 AM)

Q304.For slightly asymmetric series the average is 125 km and 130.7 km respectively. The mode and mean are as follows:

A129.7m B128.8km C128.8m D124.8m

Show answer

EnglishDSSSB 23 SEP 2018 (9 AM-11 AM)

Q305.If in two correlated variables x and y have coefficient of correlation between x & y is 0.8014, the variances of x & y is 16 & 25. Then the covariate between x and y is-

A162.08 B16.208 C16.028 D160.28

Show answer

EnglishDSSSB 23 SEP 2018 (9 AM-11 AM)

Q306.Find out the fallacy if any in the statement: "The mean and the variance of a binomial distribution is 16.2 and 29.4 respectively."

A49 p 27 = is not possible. B49 q 27 = is not possible. CThe statement is true D47 p 27 = is not possible.

Show answer

EnglishLT 2018 TGT 2011

Q307.The mean of 1, 3, 4, 5, 7, 4 is n. The numbers 3, 2, 2, 4, 3, p, 3 have mean n –1 and median q. Then p+q is

A6 B4 C7 D5

Show answer

EnglishLT 2018

Q308.The mean weight of 9 items is 15kg. If one more item is added, the mean weight becomes 16 kg. Then the weight of the 10th item is

A35kg B30kg C25kg D20kg

Show answer

EnglishDSSSB TGT (SECTION-B) 28 DEC 2014

Q309.Mean of 100 observations is 45. It was later found that two observations 19 and 31 were recorded incorrectly as 91 and 13, then the correct mean is–

A44.46 B44 C45 DNone of these

Show answer

EnglishDSSSB TGT (SECTION-B) 28 DEC 2014; Section (B) PGT Tier-I (31.11.2014)

Q310.In a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately–

A20.5 B25.5 C24 D22

Show answer

EnglishSECTION B PGT TIER-I 31.11.2014

Q311.Standard deviations for first 10 natural numbers is–

A5.5 B3.87 C2.97 D2.87

Show answer

EnglishSECTION B PGT TIER-I 31.11.2014

Q312.The mean of 100 observations is 30. If two observations were wrongly taken as 32 and 12 instead of 23 and 11, then the correct mean is–

A29.9 B28.9 C25 Dnone of these

Show answer

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

Q313.If the coefficient of variation and standard deviation are 60 and 21 respectively, the arithmetic mean of distribution is–

A60 B30 C35 D21

Show answer

EnglishTGT 2001

Q314.The median of the numbers 50, 48, 47, 48.5, 50.5, 52, 48.8, 46 will be:

A48 B50 C48.5 D48.65

Show answer

EnglishTGT 2001

Q315.The mean of the given data is 50. If the frequencies of class intervals 20-40 and 60-80 are f2 and f4 will be: Class interval Frequency 0-20 20-40 40-60 60-80 80-100 17 f2 32 f4 19 Total 120

A18, 14 B28, 24 C20, 24 D22, 28

Show answer

EnglishRajasthan TGT 2016

Q316.Standard deviation of Binomial distribution is equal to (n, p, q have their usual meaning)

Anpq Bnp Cnpq Dnp

Show answer

EnglishRajasthan TGT 2016

Q317.If mean and mode of a distribution are 12.2 and 11.3 respectively, then median of distribution is equal to

A13.1 B34.8 C35.7 D11.9

Show answer

EnglishRajasthan TGT 2016

Q318.Standard deviation of a distribution is σ. If all values of the variate multiplied by a constant quantity h, then variance of the distribution is equal to

Ahσ Bh2/σ Ch2/σ2 Dhσ2

Show answer

EnglishRajasthan TGT 2016

Q319.The weighted mean of first n natural numbers whose weights are equal to the square of the corresponding number is

A() 2 n n 2 4 + B3n n 1/2 2n 1 C() n n 1 2 + D()() n 1 2n 1 6 + +

Show answer

EnglishRajasthan TGT 2016

Q320.If mean of a Binomial distribution is 3 and its variance is 3, 2 the number of trials is

A4 B6 C8 D12

Show answer