Arithmetic Mean - Class IX

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Multiple Choice

What is the value of mean for the following data:

Marks No. of Student
$5-14$ $10$
$15-24$ $18$
$25-34$ $32$
$35-44$ $26$
$45-54$ $14$
$55-64$ $10$
  1. $30$
  2. $29$
  3. $33.68$
  4. $34.21$
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