Q1)The number of times a particular entry occurs in an observation is: a) range b)class mark c) array d) frequency. Q2) The mean of first 20 natural numbers is: a) 10.5 b)105 c)11.5 d)115 Q3)Mode is the value of the data: a) having maximum value b)whose position is in the middle c) occurring maximum number of times d)occurring minimum number of times. Q4)A cricketer scores the following runs in eight innings:48,72,30,56,0,7,100. The range of runs scored is: a)30 b)56 c)93 d)100.

Mean of first 30 natural numbers ==n+12=20+12=10.5
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