Question

what is the class mark of class 60-69 explain how to do step by step ​

Answer 1

Answer:

Step-by-step explanation:

1. Add the lower n upper limit of the class ( here.. 60+69 =129)

2 divide the no. Obtained by 2 (here 129÷2= 64.5)

3 thus ur required class mark is 64.5

Alternate method

1. Take the difference of upper n Lower limit (here.. 69-60= 9)

2. Divide the no. Obtained by 2 (9÷2=4.5)

3. Add the no. Obtained to the lower limit of the class..( 60 +4.5 = 64.5)

4. Required class mark is 64.5

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