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3. Of 50 random pupils surveyed, 26 own a dog, 8 own a cat, 14 own a dog and a
cat, and 2 own neither a dog nor cat. Based upon the results, how many of the
next 30 pupils surveyed would you expect to own a dog and a cat?
4. A film fest coordinator made an online poll about people's preference on film
genres. The poll showed that 28 out of 150 prefer to view love romance movies.​

Sagot :

GorgeousQuinnidn

Answer:

3. 8 pupils.

4. 224

Step-by-step explanation:

3. For 50 pupils, 14 owns a dog and a cat.

    PDC = [tex]\frac{14}{50\\}[/tex] = [tex]\frac{7}{25}[/tex]

Suppose that the probability is the same.

so PDC = [tex]\frac{7}{25}[/tex] for next 30 pupils.

    NDC = [tex]\frac{7}{25}[/tex] × 30 = [tex]\frac{42}{5}[/tex]

    [tex]\frac{42\\}{5}[/tex] = 8 (People cannot have 0.4, it should be whole number)

4.  Given: 28 out of 150 prefer to view love romance.

 To Find: How many people out of 1200 will prefer movies.

Solutions: Let numbers of people = x

                 [tex]\frac{28}{150}[/tex] = [tex]\frac{x}{1200}[/tex]

              x = 1200 × [tex]\frac{28}{150}[/tex]

                  = 224

Sana makatulong:)

goodluck<3

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