Question

what is the probability of taking 3 blue pen from a grp of 6 black pen and 4 blue pen​

Answer 1

Answer:

3/10

Step-by-step explanation:

Answer 2

Answer:

1/30

Step-by-step explanation:

selecting 3 blue pens from 4 blue pen

= 4c3

selecting 3 pens from total pens(6+4=10)=10c3

probability =4c3/10c3 =4/120=1/30

4c3=4

10c3 =10×9×8/3!=120

hope this helps