Q120 of 140 Page 196

What’s the Error? A student said that the ratios and were proportional. What error did the student make?

Two ratios a:b and C:d are said to be proportional, if =


But given, and


⇒ 3 × 16 not equal to 4× 9


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118

Language Application

Given below are few Mathematical terms.



Find


A. The ratio of consonants to vowels in each of the terms.


B. The percentage of consonants in each of the terms.

 119

What’s the Error? An analysis showed that 0.06 per cent of the T-shirts made by one company were defective. A student says this is 6 out of every 100. What is the student’s error?

 121

What’s the Error? A clothing store charges Rs 1024 for 4 T-shirts. A student says that the unit price is Rs 25.6 per T-shirt. What is the error? What is the correct unit price?

 122

A tea merchant blends two varieties of tea in the ratio of 5 : 4. The cost of first variety is Rs 200 per kg and that of second variety is Rs 300 per kg. If he sells the blended tea at the rate of Rs 275 per kg, find out the percentage of her profit or loss.