Question

A drawing class was assigned a final project where students had to choose one art medium and one subject. The teacher kept track of the types of projects submitted.
The probability that a student used chalk is 0.3, the probability that a student chose to draw a plant is 0.6, and the probability that a student used chalk and chose to draw a plant is 0.2.
What is the probability that a randomly chosen student used chalk or chose to draw a plant?

Answer 1

Using probability concepts, it is found that: 0.7 = 70% probability that a randomly chosen student used chalk or chose to draw a plant.

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I am going to treat the probabilities of these events as Venn probabilities, stating that:

• Probability A: student used a chalk.
• Probability B: student chose to draw a plant.

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• 0.3 probability of a student using a chalk, thus $P(A) = 0.3$
• 0.6 probability that the student chose to draw a plant, thus $P(B) = 0.6$
• 0.2 probability of both, thus $P(A \cap B) = 0.2$.

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The probability of chalk or plant is:

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$

From the bullet points:

$P(A \cup B) = 0.3 + 0.6 - 0.2 = 0.7$

0.7 = 70% probability that a randomly chosen student used chalk or chose to draw a plant.

A similar problem is given at https://brainly.com/question/24231264