MPSC Rajyaseva 2023 CSAT — Question 64
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20 प्रश्नांची प्रश्नपत्रिका तयार केली आहे. प्रत्येक प्रश्नाला दोन अंतर्गत पर्याय आहेत. दिलेल्या सर्व प्रश्नातील एक किंवा अधिक प्रश्नांना उत्तरे देण्याच्या विद्यार्थ्याला शक्य असणाऱ्या मार्गांची संख्या निवडा.
1)3^20 - 1✓ Correct
2)3^20
3)3^18
4)3^17
Each of the 20 questions can be dealt with in 3 ways: answer the first internal option, answer the second, or leave it. That gives 3^20 combinations, one of which is 'no question answered'. Since at least one question must be answered, the number of ways is 3^20 − 1.
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