Pls help asap it math

2133 bricks

Step-by-step explanation:

a27=1

a4=139

  a27=a4+23r

   1=139+23r

  23r=1-139

23r=-138

r=-138/23=-6

a4=a1+3r

139=a1-18

a1=139+18

a1=157

n=a1++a1+26*r=a1+a1+r++a1+26r=27*a1+r(1+2+...+26)

=27*157-6*26*27/2=4239-3*26*27=4239-2106=2133

two data sets with the same median will not have the same varaibility

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560