a survey was conducted among 50 people on the ice cream flavor they like it was found out that 34 like chocolate 18 like manila and 20 like furthermore 11 like chocolate and strawberry and 13 like chocolate and vanilla non like strawberry and vanilla and 6 like all the flavors

17.3964 males 7.6035 females

Step-by-step explanation:

The first way to calculate the expected uses the marginal percentages. If sex is not related to flavor preference, you would expect the same percentages of males to prefer the same flavors as females. Since overall 20.71% prefer vanilla, you would expect 20.71% of males to prefer vanilla. Now, 20.71% of 84 people is 17.3964, so this is how many males you would expect to prefer vanilla. You would also expect 20.71% of the females to prefer vanilla, which is 17.6035. So you'd expect 17.3964 males and 17.6035 females to prefer vanilla.

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0