Question

there are 20 red pens and 30 green pens in pouch of 50 pens. find out the probability of none red pen

chapter no 15 probability
class 9​

Answer 1

Answer:

Step-by-step explanation:

red pen probability=20/50

                                = 2/5

probability of one red pen pen = 2/5

                                     

                                                         

Answer 2

Answer:

Firstly we write the formula (Total no.of outcomes -favourable outcomes) now the Total no. of outcomes is 50 and red pens is 20 so 50 -20 = 30