Saved Bookmarks
| 1. |
ULU TUTU 7 12 4 1. Each side of a regular polygon is 2.5 cm in length. The perimeter of the polygon is 12.5cm. How many sides does the polygon have? 2. Michael finished colouring a picture in hour. Vaibhav finished colouring the same picture in hour. Who worked longer? By what fraction was it longer? 3. Find i) 2.5 x 0.3 ii) 156.1 x 100 ii) 7.75 = 0.25 4. The scores in mathematics test (out of 25) of 15 students is as follows: 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20 Find the mode and media of this data. Are they same? |
|
Answer» Answer:
2.Solution:- From the given details we get to know that Time taken by the Michael to colour the picture is = (7/12) Time taken by the Vaibhav to colour the picture is = (3/4) We will convert the above fractions into like fractions by taking LCM The LCM of 12, 4 = 12 Convertingthe given fraction into an equivalent fraction having 12 as the denominator. (7/12) = (7/12) × (1/1) = 7/12 (3/4) = (3/4) × (3/3) = 9/12 Clearly, (7/12) < (9/12) Hence, (7/12) < (3/4) Therefore, Vaibhav worked for longer time. Thus, Vaibhav worked longer time by = (3/4) – (7/12) = (9/12) – (7/12) = (9 – 7)/12 = (2/12) = (1/6) of an hour. Answer Vainhav worked longer for (1/6) of an hour. 3.Let's know the meaning of the terms "Mode" and "Median" Mode = The no. which is occurring most frequently in a set of numbers is called Mode Median = Median REFERS to the value which lie in the middle of the set of numbers (When arranged in ascending or descending order). Now Coming to the question :- First we will find the mode of the data :- 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20 20 have occurred 4 times ∴ The most frequently occurring value = 20 Therefore the mode of the given set of data is 20 Now Median; Numbers arranged in ascending order = 5, 9, 10, 12, 15, 16, 19, 20, 20, 20, 20, 23, 24, 25, 25 So the middle value here is 20. Median and Mode both are same. Step-by-step explanation: plz mark me as brainlist |
|