Direction : Study the given histogram carefully and answer the questions given below it. The number of hours for which 80 students of a particular class watched television during holidays has been shown through the given graph.
How many students watched TV for less than 4 hours ?
34
In a histogram the height of each bar gives the frequency of its class interval. Reading the given graph, the classes of hours of TV watched per day and the number of students are: 1–2 hours: 4, 2–3 hours: 8, 3–4 hours: 22, 4–5 hours: 32, 5–6 hours: 8 and 6–7 hours: 6. Check: 4 + 8 + 22 + 32 + 8 + 6 = 80, which matches the 80 students stated in the data.
Step 1 — ‘Less than 4 hours’ covers every class whose upper limit is 4 or below: 1–2, 2–3 and 3–4 hours.
Step 2 — Add their frequencies: 4 + 8 + 22 = 34 students.
22 is only the 3–4 hour bar on its own, while 28 and 30 do not equal any valid combination of the bars below 4 hours.
34 option is correct.
Similar Questions
How many students spent more than 5 hours in watching TV ?
Find the next term of the following number pattern :
107, 97, 82, 62, ...
How many packets of \(\dfrac{1}{12}\) kg salt can be made from \(7\dfrac{1}{2}\) kg of salt ?
Which one of the following costs the least ?
At what rate the simple interest will be \(\dfrac{2}{5}\) times to the original sum in 10 years ?
A person X sells an article of Rs. 100 with a loss of 10% to the person Y. Y sells it at a gain of 10% to another person Z. What is the price at which Y sold it to Z ?
1 litre is equal to how many cubic centimetres ?
A cuboid has ............. pairs of identical faces.
The ages (in year) of 10 teachers of a school are 32, 41, 28, 54, 35, 26, 23, 33, 38 and 40. What is the range of the ages of the teachers ?
Which of the following should be the characteristics of mathematical language at primary level ?
I. It should be precise
II. It must be ambiguous as it can add openness in the subject
III. It should be reinforced through child’s language used in everyday life
IV. It must be highly technical as it will help students to communicate accurately in Mathematics
Important Questions from Mixed Topic (JTET)
What does inclusive education entail?
Students struggling with dyslexia can be taught
Which of the following views about intelligence supports the respectful consideration of diversity among learners?
Developmental changes in children are
According to Jean Piaget cognitive development is facilitated by the process of
