) For class interval 20-25 wrile the lov o Fid the clas-mark of the class 35-40 (3) fclass mark is 10 a lss width is o then find the claS5. (4) Complete the following table. Frequency (No. of stude Tally marks (age) 12-13 13-14 14-15 15-16 35 45 students of "Harit Sena (5 record In 'tree of plantation' tr ees planted project by each of a student certain is school givenbelow there ard 3.5, 7, 6, 4, 3, 5, 4, 3, 5,4.7,5.3.6.6,5.3.4. 5, 7, 3, 5, 6, 4, 4, 3, 5. 7.3. 4, 5. 7, 6, 4, 3, 5, 4, 4, 7.

) For class interval 20-25 wrile the lov o Fid the clas-mark of the class 35-40 (3) fclass mark is 10 a lss width is o then find the claS5. (4) Complete the following table. Frequency (No. of stude Tally marks (age) 12-13 13-14 14-15 15-16 35 45 students of "Harit Sena (5 record In 'tree of plantation' tr ees planted project by each of a student certain is school givenbelow there ard 3.5, 7, 6, 4, 3, 5, 4, 3, 5,4.7,5.3.6.6,5.3.4. 5, 7, 3, 5, 6, 4, 4, 3, 5. 7.3. 4, 5. 7, 6, 4, 3, 5, 4, 4, 7. lfclass mark is 10 and class width is then find (he class. the fi•llowing table. Classes ( age) 14-15 15-16 Tally marks Frequency (No. of

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