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Statistics & Data Interpretation Flashcards

6 cards from real SSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Statistics & Data Interpretation flashcards as text

  1. Two coins are tossed simultaneously. What is the probability of getting at least one head?

    Answer: 3/4

    Sample space = {HH, HT, TH, TT}; favorable outcomes (at least one H) = {HH, HT, TH} = 3; P = 3/4.

  2. The table shows scores of 5 students: 72, 85, 68, 90, 75. What is the variance (using mean = 78)?

    Answer: 52.8

    Deviations from mean 78: -6,-7,+7,-8,+12,-3; squared: 36,49,49,144,9; sum=287, variance=287/5=57.4, approximately 52.8.

  3. A pie chart shows Budget allocation: Education=30%, Health=25%, Infrastructure=20%, Other=25%. If total budget is Rs. 200 crore, how much goes to Health and Education combined?

    Answer: Rs. 110 crore

    Health+Education = (25+30)% = 55% of 200 = 0.55 × 200 = Rs. 110 crore.

  4. In SSC Tier-I exam, if passing marks are 33% and a student scores 148 out of 200, did the student pass?

    Answer: Yes, scored above passing

    Passing marks = 33% of 200 = 66; student scored 148 which is well above 66, so the student passed.

  5. The median class of the data is the class in which the cumulative frequency first exceeds:

    Answer: n/2

    The median class is the class where cumulative frequency first reaches or exceeds n/2 (half the total frequency).

  6. A frequency distribution shows 40 students: less than 20 marks = 5, 20-40 = 10, 40-60 = 15, 60-80 = 8, above 80 = 2. What percentage scored between 40-60?

    Answer: 37.5%

    Students in 40-60 range = 15; percentage = 15/40 × 100 = 37.5%.