1.

2. 10-30, 30-50, etc. the size of the class interval is 20. the upper limit of the fourth class is​

Answer»

Answer:

Step-by-step explanation:

10-30, 30-50, etc

here CLASS interval =20

So CLASSES can be written as:

1. 10-30

2. 30-50

3. 50-70

4. 70-90

5.90-110

Thus the upper LIMIT of 4th class =90



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