d1 = 51(t)
d2 = 71(8 - t)
d1 + d2 = 508
and now you just have to solve for t.
The decimal of 2.1 is greater than 2.0 but less than 2.42
Answer: 3
Step-by-step explanation:
Let E be the event of that student pierces ear and N be the event of that student pierces nose.
Given: 

For any two event A and B, we have

Similarly , 

Hence, 3 students have piercings both on their ears and their noses.
Answer:
0.17 !!!!!!!
Hope this helps you!!!!!
Step-by-step explanation:
[tex]4 - (x + 20 ) = 16
x=0