Practice30Create account

A frequency polygon of two classes A and B is drawn. At class mark 30, A is at frequency 12 and B is at frequency 12; both polygons cross here.
What does this intersection point mean?

Class 9Frequency PolygonsStatistics and Probability
  • AFor that class, A and B have equal frequency
  • BA has more students overall
  • CB has the higher mode
  • DThe class size is 30

Step-by-Step Solution

Where two polygons intersect, the -values are equal, so the two distributions have the same frequency for that class.
Answer: A) For that class, A and B have equal frequency

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Frequency Polygons practice questions

More Class 9 Frequency Polygons practice

A frequency distribution of pocket money (in Rs) of Class 9 students has unequal class…The class marks of a distribution are an arithmetic sequence: 13, 21, 29, 37, ... If the…A frequency polygon for runs scored in a Mumbai gully-cricket league has its highest…A class has lower limit 35 and class mark 40. Two consecutive classes follow with the…In a survey of 50 households in Lucknow on number of electrical appliances, the closed…