Find the probability of (c’ u d’)

Step-by-step explanation:

number of elements in C or D = 1+2+4+5+10+9 = 31

i.e. C ∪ D =31

Let X be the universal set i.e. elements in rectangular figure

= 31+15+9

=55

probability of C ∪ D is given by

P (C ∪ D) =

squares, rhombus, rectangles

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;