Given a = {a, e, i, o, u} and b = {a, l, g, e, b, r}, find a ∪ b.

A={a, e, i, o, u}

B={a, l, g, e, b, r}

⇒A ∪ B=Set consisting of Common as well as non common elements of A and B.

=Here, a and e are common elements and i,o, u, l,g,b,r are non common elements.

     ={a,e,i,o,u,l,g,b ,r}

there would be 365 different 4 digit numbers

step-by-step explanation:

i belive that it is 365 because i asked google

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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