julianwuzhere julianwuzhere
  • 07-03-2019
  • Mathematics
contestada

PLZ HELP You roll a number cube twice. What is the probability of rolling a 2 first and then rolling an odd number?

1/36

1/12

1/9

1/4

Respuesta :

laurellee27
laurellee27 laurellee27
  • 09-03-2019

Answer:

1/12

Step-by-step explanation:

The probability on an equal dice is 1/6

There is only one 2 on a dice; therefore, the probability of rolling a 2 is 1/6.

There three odd numbers on a dice; therefore, the probability of rolling an odd number is 3/6 = 1/2.

Because the events are dependent on each other (you HAVE to roll a 2 first AND you HAVE to roll an odd number after), multiply them.

1/6 * 3/6 = 1/12

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