The class mark of class<math><mrow><mn>140</mn><mo>−</mo><mn>150</mn></mrow></math><xml> </xml>is

A number is selected at random from the numbers 1 to 20. What is the probability that it is a prime number?

Consider the system of equations&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>ax</mi><mo>+</mo><mi>by</mi><mo>=</mo><mn>0</mn><mo>,</mo><mi>cx</mi><mo>+</mo><mi>dy</mi><mo>=</mo><mn>0</mn><mtext>, where&nbsp;</mtext><mi mathvariant="normal">a</mi><mo>,</mo><mi mathvariant="normal">b</mi><mo>,</mo><mi mathvariant="normal">c</mi><mo>,</mo><mi mathvariant="normal">d</mi><mo>∈</mo><mo>{</mo><mn>0</mn><mo>,</mo><mn>1</mn><mo>}</mo></math> Statement I: The probability that the system of equations has a unique solution is 3/8. Statement II: The probability that the system of equations has a solution is 1. &nbsp;

If the frequency of an object is 5, its tally mark is:

If the probability that “x” is selected in the interview is&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>3</mn></mfrac></math>, then the probability that he is not selected in the interview is

A fair coin is tossed 15 times. The probability of getting atleast 9 consecutive heads is

The class mark of class $140 - 150$ is

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The class mark of class140−150 is

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The class mark of class $140 - 150$ is