Thirty-Five Percent of the Students Who Enroll in a Statistics

Thirty-five percent of the students who enroll in a statistics course go to the statistics laboratory on a regular basis.Past data indicates that 40% of those students who use the lab on a regular basis make a grade of B or better.On the other hand,10% of students who do not go to the lab on a regular basis make a grade of B or better.If a particular student made an A,determine the probability that she or he used the lab on a regular basis.