SOLUTION: How to present the solution of the following problem on Excel spread sheet as well as on TI-84 calculator? (I shall be thankfull to you.I am not much expert in using Excel and ca

Algebra ->  Probability-and-statistics -> SOLUTION: How to present the solution of the following problem on Excel spread sheet as well as on TI-84 calculator? (I shall be thankfull to you.I am not much expert in using Excel and ca      Log On


   



Question 421911: How to present the solution of the following problem on Excel spread sheet as well as on TI-84 calculator?
(I shall be thankfull to you.I am not much expert in using Excel and calculator.I need this for my class presentation. I need help,please.)
Q.
The ratio of boys to girls in Mr Peter'class is 3:4. On the last day of exam 3/4 of the boys passed the exam and 4/5 of the girls passed. If a student's exam paper is chosen at random, what is the probability that it has a passing grade?

Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

probability that chosen paper has a passing grade = [3*3/4 + 4*4/5]/ (3+4)
= 109/140