There were 70 runners to start a race in the first half of the race 2/5 of them dropped out in the second half of the race 4/7 of the remaining runners dropped out.how many runners finished the race
Out of the 70 runners who started the race, 2/5 dropped out in the second half, leaving 3/5 of the runners still in the race.
3/5 of 70 is 42 runners.
Then, 4/7 of the remaining 42 runners dropped out.
4/7 of 42 is 24 runners.
Therefore, the number of runners who finished the race is:
Remaining runners - Runners who dropped out = 42 - 24 = 18 runners.
So, 18 runners finished the race.