Theoretical probability

[aburchett]

The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 11. If 110 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?

 

[galactus]

The odds are 2:11 of undesireable effects. 2 bad effects for every 11 good effects.

To convert odds to probability, add the numbers 2+11=13.

Then, the probability of having bad effects would be 2/13.

Good effects would be 11/13.

Add them and you get 1.

So, what is 2/13 multiplied by 110?.

 

[aburchett]

So 2/13+11/13=13/13 or 1

2/13 * 110/1= 220/13= 16.923

So would you say 16 out of 110 will encounter undesirable side effects?