Simplify: \(2^{3} \times 2^{2} \div 2^{4}\)
2
Use the laws of exponents for a common base: \(a^{m} \times a^{n} = a^{m+n}\) and \(a^{m} \div a^{n} = a^{m-n}\).
Combine the indices: \(2^{3} \times 2^{2} \div 2^{4} = 2^{3 + 2 - 4} = 2^{1}\).
Evaluate: \(2^{1} = 2\).
Hence, the simplified value is 2.
What is the mean of the following distribution?
| Marks | 14 | 28 | 55 | 75 | 93 |
| No. of Students | 33 | 81 | 73 | 44 | 35 |
A molecular compound contains atoms A and B, where their counts per molecule are the 5th and 7th prime numbers from starting, respectively. The compound consists of 10 identical molecules. After a reaction, the number of B atoms per molecule doubles, and C atoms (equal to the 3rd prime number from starting) are added. What is the total number of A, B, and C atoms in all 10 molecules after the reaction?
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In a group of 200 students, each student studies 8 subjects and each subject is studied by 20 students. What is the total number of subjects:
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