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141. Mean of first five prime numbers is:

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142. The class size and class mark respectively of the class 15 – 20 is:

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143. In a data, 10 numbers are arranged in increasing order. If 7th entry is increased by, then median is increased by:

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144. Let m be the mid value and I be the upper limit of a class in a frequency distribution. The lower limit of the class is:

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145. The median of the observations 26, 28, 31, 31, 33, x, x + 2, 37, 39, 41 is 34. The value of x is:

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146. The mean of perimeters of two squares having sides x units and y units is:

(x + y) units
$open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses space units$
2(x+y) units
2(x+y) units

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147. In a data of 12 members arranged in ascending order, if the 9th observation is increased by 5, then median increases by:

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148. Two consecutive class marks of a distribution are 52 and 57. Then the class size is:

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149. The range of the data 7, 9, 7, 5, 9, 9, 18, 6, 8, 9 is:

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150. Median of first 8 prime numbers is:

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