Physics
Grade-7
Easy

Question

Convex lenses are ____ in the middle and ____ towards the edge

  1. Thicker, thinner
  2. Thinner, thicker
  3. Thicker, thicker
  4. Thinner, thinner

The correct answer is: Thicker, thinner

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No. of children

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2

3

4

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No. of children

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2

3

4

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20

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Four people conducted an experiment to find how often a flipped coin lands on tails. The results are shown in the table below.

Name

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22

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Find the probability that a randomly selected family has an even number of children.

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