# logic

in a bike competition with 21 laps was observed that 13% quit before 5 laps, 17% quit later than 5 laps but less than 15, and the others 210 finished the competition the number of bikers that quit before the 5 lap were:
a) 27
b) 39
c) 43
d) 56

1. 👍 0
2. 👎 0
3. 👁 91
1. 13%+17% = 30% who quit
So, 210 were the remaining 70%
210/.7 = 300

13% of 300 = 39

1. 👍 0
2. 👎 0
posted by Steve

## Similar Questions

1. ### math

Todd run 8 laps around a 400-meter track on Monday, 4 laps on Tuesday, 8 laps on Wednesday, 4 laps on Thursday, and 8 laps on Friday. How many kilometers did he run?

asked by Edward on May 19, 2015
2. ### Algebra II

Can you please explain what formula I need to do to solve the following problem: If 3 laps = 5/8 mile, how many laps needs to be completed to run 3 miles? Don't look for "formulas" to do these kind of questions, use ratios, one of

asked by Sami on August 15, 2007
3. ### math

the track cpach records the number of laps the team runs each day fr a week in the table below. if the team rus at most 10 laps each day, then they have to practice saturday. use the inequalty l is less than of equal to where l

asked by spartans on February 16, 2015
4. ### math

Courtney is supposed to run laps around the outdoor track. At the start of each lap, however (even the first), there is always an 8 percent chance that Courtney will call it quits for the day. What is the probability that today

asked by will on March 11, 2019
5. ### math

The equation y = 1.6x represents the number of laps Henry can swim over time, where y is the number of laps and x is time in minutes. The table shows the number of laps Larry can swim over time. How many laps can each boy complete

asked by liliana on December 3, 2015
6. ### math

Maria ran 4 laps of the track at the same pace. If it took 4 1/2 minutes to run the first 3 laps how long did it take her to run all 4 laps

asked by jasmine on January 10, 2013
7. ### pre algebra

Lilliana is training for a marathon. She runs the same distance every day for a week. On Monday, Wednesday, and Friday, she runs 3 laps on a running trail and then runs 6 more miles. On Tuesday and Sunday, she runs 5 laps on the

asked by mark on October 19, 2017
8. ### math

A relay with n laps was run by 4 people. The first runner ran half the laps. The second runner ran half the amount of laps the first runner ran. The third runner ran half the amount of laps the second runner ran. The remaining

asked by Tomas on November 14, 2013
9. ### Physics

To qualify for the Indianapolis 500 race, a car must average 350 km/hr for four laps. Of a driver averages 285 km/hr for the first two laps, what average speed must be achieved for the final two laps in order to qualify?

asked by Anonymous on September 10, 2018
10. ### physics

to qualify for a race, a car must average 350 km/hr for four laps. If a driver averages 285 km/hr for the first two laps, what average speed must be achieved for the final two laps in order to qualify?

asked by mary otto on September 25, 2012

More Similar Questions