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2.2.2 Area in a histogram is proportional to frequency

Question 4

A histogram has classes $0≤x<100\leq x<10$ , $10\leq x<25\,$ and $25≤x<3025\leq x<30$ . The first two frequency densities are 1.2 and 0.8, and the total frequency is 30.

Find the frequency density for $25≤x<3025\leq x<30$ .

[2]

Find the probability that a randomly selected observation is at least 25.

[1]

Markscheme

2.2.2 Area in a histogram is proportional to frequency Questions

A Level
Maths
2.2.2 Area in a histogram is proportional to frequency

8 exam-style questions on OCR (MEI) A Level Maths 2.2.2 Area in a histogram is proportional to frequency. Each one has a worked solution and a mark scheme showing where the marks go.

2.2.2 Area in a histogram is proportional to frequency

Question bank

2.2.2 Area in a histogram is proportional to frequency

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Question 4

A histogram has classes $0≤x<100\leq x<10$ , $10\leq x<25\,$ and $25≤x<3025\leq x<30$ . The first two frequency densities are 1.2 and 0.8, and the total frequency is 30.

Find the frequency density for $25≤x<3025\leq x<30$ .

[2]

Find the probability that a randomly selected observation is at least 25.

[1]

Markscheme

2.2.2 Area in a histogram is proportional to frequency Questions

A Level
Maths
2.2.2 Area in a histogram is proportional to frequency

8 exam-style questions on OCR (MEI) A Level Maths 2.2.2 Area in a histogram is proportional to frequency. Each one has a worked solution and a mark scheme showing where the marks go.