So 29 students in this class passed the math exam.
(2) According to the histogram, the number of people including grades is 50× 10×0.004=2,
Let the grades be x and y?
The number of people with grade [90, 100] is 50× 10×0.006=3, and the grades are A, B, C,
If a situation,
In three cases,
If so, yes.
* * * There are six situations, so the total number of basic events is 10.
There are six basic events in the event ""?
?
leave out