JCERT · Class 7 · Chapter 22 · Data Handling and Probability. Topic notes aligned to the official chapter; these are not solutions to every textbook exercise.
JCERT · Class 7 · Chapter 22 · Data Handling and Probability. Topic notes aligned to the official chapter; these are not solutions to every textbook exercise.
JCERT · Regular schools (Non-SOE) · Class 7 · Chapter 22 — Data Handling and Probability
Official syllabus pages 289–311. Official syllabus · Prescribed Hindi book (22 chapters) · Separate supplementary reference.
These topic notes and teaching examples are not a complete answer key to every textbook question. English notes use this same JCERT chapter order; a matching English textbook PDF has not been verified.
Organise data with tally marks and frequency tables and label bar-chart scales. Mean is sum divided by count; median is the middle ordered value; mode is the most frequent value. With equally likely outcomes, probability is the fraction of favourable outcomes.
Order data before finding a median and average the two middle values. The die calculation assumes fairness.
Mean = 26/4 = 6.5; median = (5 + 8)/2 = 6.5; P(6) = 1/6
Order data before finding a median and average the two middle values. The die calculation assumes fairness.
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