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Start learning 50% faster. Sign in nowChina's Deep Underground and Ultra-low Radiation Background Facility (DURF), the world's deepest underground laboratory, becomes operational. Located 2,400 meters deep beneath Jinping Mountain in Liangshan Yi Autonomous Prefecture, Sichuan Province. The DURF has a total room capacity of 330,000 cubic meters. Scientists believe the lab enhances the global search for dark matter, a hypothetical form of matter that doesn't interact with light or the electromagnetic field. It was launched after three years of upgrades and expansion, forming the second phase of China Jinping Underground Laboratory. Constructed by Tsinghua University and Yalong River Hydropower Development Company, Ltd., the facility offers special testing conditions unavailable elsewhere. The first phase of China Jinping Underground Laboratory, completed in 2010, contributed to scientific achievements in China's dark matter direct detection experiments.
A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...Ten tickets numbered 1 to 15 are placed in a box, mixed up thoroughly and then one ticket is drawn randomly. If it is known that the number on the drawn...
A box contains 21 ribbons out of which [A] ribbons are white, and rest is green in colour. The probability of drawing a white ribbon and a green ribbon ...
The probability of selecting a rotten egg randomly from a basket of 800 eggs is 0.26. What is the number of rotten eggs in the basket?
The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap?
...One summer peter visits 4 villages (A, B, C and D) in a random order. Find the probability that he visits (i) A before B (ii) A before B and B before C ...
In a class, there are 16 boys and 24 girls. One of them is called out by an enroll number. What is the probability that the one called is a girl?
In a container holding 18 balls of three shades – orange, purple, and white – the probability of picking an orange ball is 1/3. If the count of whit...
In a box there are 12 orange, 5 white, and 7 blue balls. One ball is picked up randomly. What is the probability that it is neither white nor blue?
...A bag contains 5 red balls, 4 green balls, and 3 yellow balls. Two balls are drawn randomly. What is the probability that both are of the same color?