The bar graph shows 1 month's sales figures of different brands of mobile phones of a certain electronics store in Rs. 1000s. Study the diagram and answer the following questions.
Sales of which mobile phone brand were the second highest?
________________ refers to the superposing of two or more coherent waves to produce regions of maxima and minima in space, according to the principle of superposition.
In the following figure, rectangle represents Dentists, circle represents Bloggers, triangle represents Comedians and square represents Boxers. Which set of letters represents Dentists who are either Bloggers or Comedians?