Question
Who conducted X-ray spectroscopic study of a large
number of elements and showed that the frequency of X-rays emitted by an element is related to the atomic number, Z, rather than the atomic mass?Solution
The correct answer is D
John is answering a survey with 3 questions, each with 2 options. Only one option is correct per question. If John answers randomly, what is the probabi...
The probability of selecting a rotten egg randomly from a basket of 1050 eggs is 0.36. What is the number of rotten eggs in the basket?
- If Ravi lies 4 out of 10 times and Vikram lies 6 out of 10 times, what is the probability that Ravi and Vikram will agree with each other?
What is the probability that the cards drawn contains exactly 2 purple card?
- A bag holds 20 balls, each labeled with a unique number that follows a sequence of consecutive multiples of 5, beginning with 5. What is the probability of...
A question is given to Saket, Ankush and Prem. Probability that Saket, Ankush and Prem can solve the question is 1/3, 2/5 and 1/2. Find the probability ...
- If 4 cards fall out while shuffling a deck of 52 cards, what is the probability that all of them are aces?
1. 1/ 52 C 4
2. 4/ 52... - In how many ways can the letters of the word "CHOCOLATE" be arranged, and what is the probability that all the vowels in these arrangements always appear t...
Two dancers Seema and Reema appeared in audition of a dance competition. The probability that seema will be selected in this dance competition is 0.05 a...
A bag contains 7 white balls, 5 black balls, and 4 orange balls. Two balls are drawn at random. Find the probability that the two balls are white.
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