Question

In the class intervals 10–20, 20–30, the number 20 is included in which of the following?

        (a) 10-20                                                (b) 20-30

        (c) both the intervals                        (d) none of these intervals

Answer 1

your answer is here :-

answer (c) both the intervals

bcoz we know that ,

the first interval of frequency distribution and 20-30 is the next one but the number 20 is present in both intervals.
and 20 in the interval 10-20 is not fully 100% while in the next interval 20-30, presence of it fully 100%.

Answer 2

Answer:

answer is  (c) both the intervals