21 ball numbered 1 to 21. A ballis drawn and then another ball is drawn without replacement.  Choices:	A) 2/17	B) 3/37	C) P(E) 9 by 42	D) 8/97	E) 12/31
The probability that first toy shows the even number,   =1021= 1021   Since, the toy is not replaced there are now 9 even numbered toys and total 20 toys left.   Hence, probability that second toy shows the even number,   =920=920   Required probability,   =(1021)×(920)= (1021)×(920)   =9/42   P(E) 9 by 42
<result>C</result>
21 ball numbered 1 to 21. A ballis drawn and then another ball is drawn without replacement.