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2 years ago

A sweet shop sells 150g of sweets for £1.32 Work out the cost of buying 475g of sweets

Mathematics

2 answers:

matrenka [14]2 years ago

6 0

The cost of buying 475g of the sweets from the same company is; $4.18.

<h3>What is the cost of buying 475g of sweets?</h3>

According to the task content, it follows that the cost of buying 475g of sweets in the shop is required.

Since the shop sells 150g of sweets for £1.32, then it follows that 475g of sweets should cost;

= (475× 1.32)/150

= $4.18

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Delta makes 12-volt car batteries. These batteries are known to be normally

blondinia [14]

Answer:

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

Step-by-step explanation:

Step(i):-

Given that the sample size n =12 -volt car batteries

Let 'X' be a Random variable in a normal distribution

Given that mean of the normal distribution = 45 months

Given that the Standard deviation of the normal distribution = 8months

Step(ii):-

Let X₁ = 3 years = 12 × 3 = 36 months

$Z_{1} = \frac{x_{1} -mean}{S.D} = \frac{36-45}{8} = -1.125$

Let X₂ = 4 years = 12 × 4 = 48 months

$Z_{2} = \frac{x_{2} -mean}{S.D} = \frac{48-45}{8} = 0.375$

Step(iii):-

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = P(-1.125≤Z≤0.375)

= P(Z≤0.375) - P(Z≤-1.125)

= 0.5 +A(0.375) - (0.5-A(1.125)

= 0.5 + 0.1480 - (0.5 -0.3708)

= 0.1480 + 0.3708

= 0.5188

Final answer:-

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

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3 years ago

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damaskus [11]

Answer:

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A sweet shop sells 150g of sweets for £1.32 Work out the cost of buying 475g of sweets​

A sweet shop sells 150g of sweets for £1.32 Work out the cost of buying 475g of sweets