In a box there are 40 clothes. 20% of the clothes are blue and the rest are white. What is the minimum number of clothes that must be taken without looking in order to be certain that there must be at least two of them which must be white?
a)19
b)12
c)15
e)10
f)11

• no of blue clothes = 40*0.2 = 8
  white clothes = 40-8=32
  
  At least 10 clothes must be taken without looking in order to be certain that there must be at least two of them which must be white.
  option e)10
  
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