There were red lights on at 4 of the 10 traffic signals when traveling on the bus yesterday afternoon. What percentage of the traffic signals were green? (HOW DID YOU GET YOUR ANSWER, PLEASE SHOW YOUR WORK) A. 12
B. 1/169
C. 11 1/8
D. 60%
E. 0.5
F. 2/112
G. 25%
H. 0.25
I. 25

9514 1404 393

  D.  60%

Step-by-step explanation:

You can work multiple choice questions a number of ways. One of the most effective is to eliminate unreasonable choices.

Only two percentages are listed among the answer choices: 60% and 25%. You know that more than half of the lights were green, so the only reasonable choice is 60%.

__

If we assume lights are either red or green, then 4 of 10 red lights means 6 of the 10 lights were green. As a percentage, that fraction is ...

  6/10 × 100% = 60%

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.