Answer:
ummm
Step-by-step explanation:
idk
Probability is the ratio of something occurring vs something not occuring
As there is a 100% chance he'll be taking the test,
0.49= 49% he'll be passing
100% = 49% + x
where x= chance he'll fail
therefore x= 100%-49%= 51% he'll fail!
As per the problem,
The larger pump takes 40 minutes to fill the pool.
The smaller one takes 60 minutes.
When both the pumps are working , let the time taken be x minutes , then we can write

Hence, when both the pumps works together, Time taken =24 minutes.