Question
The probability of selecting a rotten egg randomly from
a basket of 1200 eggs is 0.22. What is the number of rotten eggs in the basket?Solution
Total number of eggs in the basket = n(S) = 1200 Let E be the event of selecting a rotten egg from the basket. Number of outcomes favourable to E = n(E) P(E) = n(E)/n(S) 0.22 = n(E)/1200 ⇒ n(E) = 1200 × 0.22 ⇒ n(E) = 264 Therefore, the number of rotten eggs in the basket = 264
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If the first quartile of data set 8,10,8,7,9 is 7.5, then the value of quartile deviation is
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X: ...
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(II) Independent of the change of scale
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