A box contains 15 mangoes out of which 8 are spoilt. If eight mangoes are chosen at random, find the probability that A number is selected at random from first twenty natural numbers. What is the chance that it is a multiple of either 4 or 15?	Pick one
A) 17/10
B) 1/10
C) 7/10
D) 1/5
E) 3/10
The probability that the number is a multiple of 4 is 5/20. (Since 4*5= 
<gadget id="calculator">4*5</gadget>
<output>20</output>
20).   Similarly the probability that the number is a multiple of 15 is 1/20. {Since   15*1= 
<gadget id="calculator">  15*1</gadget>
<output>15</output>
15).   Neither 4 nor 15 has common multiple from 1 to 20. Hence these events are mutually exclusive events. Therefore chance that the selected number is a multiple of 4 or 15 is (5+1)/20= 3/10.   ANSW3/10R:3/10
<result>E</result>
A box contains 15 mangoes out of which 8 are spoilt. If eight mangoes are chosen at random, find the probability that A number is selected at random from first twenty natural numbers. What is the chance that it is a multiple of either 4 or 15?