20{5[100-2(25+25)+20)]
1 answer:
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Two expressions that represent the sale price of the pillows are (p-0.05p) and 0.95p.
Step-by-step explanation:
Let,
Regular price of pillow = p
Mark down = 5% =
Amount of mark down = 0.05p
Amount after mark down = Regular price - Mark down amount
Amount after mark down = p - 0.05p
Taking p common = p(1-0.05) = p(0.95) = 0.95p
Two expressions that represent the sale price of the pillows are (p-0.05p) and 0.95p.
Keywords: mark down, subtraction
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Answer:
The number of heads observed is 121.14 heads
Step-by-step explanation:
The formula for the z-score of a proportion is given as follows;
Where:
= Sample proportion
p = Population success proportion = 0.5
q = 1 - p = 1 - 0.5 = 0.5
n = Number in of observation = 200
z = 2.99
Hence, we have;
Therefore;
= 0.6057
∴ The number of heads observed = 200 × 0.6057 = 121.14 heads.