Study the bar graph and answer the question.
The ratio of the number of neon lamps having a life of 900 hours or more to the number of lamps having life less than 700 hours is:
Answer & explanation
Correct answer: option 1
Number of lamps with life 900 or more : Number of lamps with life less than 700 hours
( 70 + 55 + 35 ) : ( 45 + 60 + 75 )
160 : 180
8 : 9