Answer:
0.56
Step-by-step explanation:
125 in total.
Let x be the number of those who passed both tests.
- 85 passed English, then 85-x passed only English;
- 95 passed statistics, then 95-x passed only statistics;
- 15 failed both.
Thus,
x+(85-x)+(95-x)+15=125,
195-x=125,
x=70.
Thus, the probability that they passed both tests is
[tex]Pr=\dfrac{70}{125}=\dfrac{14}{25}=0.56.[/tex]
