There are 25 bulbs,out of which 2 are fused.If 2 bulbs are drawn at random the probability of drawung one good and one fused bulb is
a)7/13 b)5/13 c)23/150 d)7/15

• There are 25 bulbs,out of which 2 are fused.If 2 bulbs are drawn at random the probability of drawung one good and one fused bulb = 2* (2/25)*(23/24) = 23/150 .. option c)
• 13 years agoHelpfull: Yes(3) No(0)
• 23C1 * 2C1
  ----------- = 23/150
  25C2
• 13 years agoHelpfull: Yes(0) No(0)