If 90 is 80% of the whole value, then 1/4 of 90 added to 90 will be the value, because 1/4 of 80% (which is 20%) added to 80% will give us 100%

So,

90/4=12.5

90 + 12.5=102.5

At least, that's my take on it

**Answer:**

0.551

**Step-by-step explanation:**

Let no. of people who take discount = x

Using binomial distribution, N c X. p^x. q^(n-x)

p : customer getting discount = 0.3, q : customer not getting discount = 0.7 n : no. of customers = 8

Probability that x < 3 : Prob (x=0) + Prob (x=1) + Prob (x=2)

= 8 c 0. (0.3)^0 . (0.7)^8 + 8 c 1. (0.3)^1 . (0.7)^7 + 8 c 2. (0.3)^2 . (0.7)^6

0.05764801 + 0.19765032 + 0.29647548

0.551

**Answer:**

6th Day = 62

12th Day = 122

15th Day = 152

**Step-by-step explanation:**

y = 10x + 2

y = 10(6) + 2

y = 60 + 2

y = 62

y = 10x + 2

y = 10(12) + 2

y = 120 + 2

y = 122

y = 10x + 2

y = 10(15) + 2

y = 150 + 2

y = 152

It’s 6w than less than symbol negative 21