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Imagine, you are solving a classification problems with highly imbalanced class. The majority class is observed 99% of times in the training data. Your model has 99% accuracy after taking the predictions on test data. Which of the following is true in such a case?
1. Accuracy metric is not a good idea for imbalanced class problems.
2.Accuracy metric is a good idea for imbalanced class problems.
3.Precision and recall metrics are good for imbalanced class problems.
4.Precision and recall metrics aren't good for imbalanced class problems.
Sohana's mathematics test had 75 problems i.e. 10 arithmetic, 30 algebra and 35 geometry problems each carrying I mark She answered 70% of the arithmetic, 40% of the algebra and 60% of the geometry problems correctly. She did not pass the test as she got less than 60% marks. How many more questions she would have needed to answer correctly to earn a 60% passing grade?
Given below are four jumbled sentences.Select the option that gives their correct order.  A.that is, many media outlets have been accused either of being too conservative or of being too liberal.  B.Who owns a media outlet often determines things such as the types of social problems that outlet presents, how long that outlet airs those problems, and how dramatically that outlet presents those problems.  C.The American media is often biased towards one or the other end of the political spectrum;   D.Mass media may use propaganda as a means to promote or publicize a particular political cause or point of view, or to maintain the viewer's attention. 
For children who are in formal operational stage teachers should - (i) Use diagrams to depict hierarchical relationships (ii) Present problems that require hypothetical thinking (iii) Avoid presenting abstract problems (iv) Give opportunities to solve problems and reason scientifically
Which of the following is/are correct? AC network analyzer is used to solve Status i. Load flow problems ii. Short circuit problems iii. Stability problems
If there are 150 questions in a 3 hr examination. Among these questions 50 are type A problems, which requires twice as much as time be spent on the rest of the type B problems. How many minutes should be spent on type A problems ?
An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computingeach of the remaining problems is
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. When the kerosene burned, the fuel in the tank below would be __________ pressure, and __________ a small circular flame would appear in the burner. The valve had tobe opened to let more kerosene vapour to the burner and pumping resumed. With the increase in pressure, the burner flame would spread _________ a loud noise. Tolower the flame, the valve had to be _________ opened to reduce the pressure and then tightened until the desired flame size was achieved. _________ you wanted theflame to be bigger, you had to hit the piston again. Pump stoves are still in vogue. was achieved. _________ you wanted the flame
The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P: They can also interfere with higher level skills such as organisation, time planning, abstract reasoning, long or short term memory and attention.  Q: It is important to realise that learning disabilities can affect an individual’s life beyond academics and can impact relationships with family, friends and in the workplace. R: These processing problems can interfere with learning basic skills such as reading, writing and/or math.   S: Learning disabilities are neurologically-based processing problems. 
In terms of NTIME, NP problems are the set of decision problems which can be solved using a non deterministic machine in _______ time.