Answer: B) 60 Explanation: -5-----------------------5-------------------20 5-(-5) = 10 20-5= 15 Ratio of cost price of book1 and book2 = 3:2  Then cost price of book 1 is given by (3/5) x 100 = Rs. 60.

Answer: B) 2/3 Explanation: Total coins 30 In that, 1 rupee coins 20 50 paise coins 10Probability of total 1 rupee coins =  20C11 Probability that 11 coins are picked = 30C11 Required probability of a coin now picked from the box is 1 rupee = 20C11/30C11 = 2/3.

Answer: A) He wanted to place strict government controls on corporations. Explanation: Woodrow Wilson was one of the major "Progressives" in American government and so 'He wanted to place strict government controls on corporations.'

Answer: A) Biosphere Explanation: The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life is called Biosphere.

Answer: B) Colors Explanation: Drinking alcohol can cause many damages to your body. Your vision can be affected as you will face blurred and double vision and even you can't identify colors.

Answer: C) Both A & B Explanation: Excretion rates of drugs vary greatly depending upon:   * The type of drug taken. * The medical condition of the person who took the drug.   Nonvolatile drugs are excreted in the body through renal excretion or through kidneys and bladder by means of urine. Other drugs are excreted either by means of sweat, bile, milk, saliva or other body fluids.

Answer: A) Jeff Bezos Explanation: Jeff Bezos is the richest person in modern history. The Amazon.com Inc. founder’s net worth broke $150 billion in New York on 16th July 2018 morning, according to the Bloomberg Billionaires Index.       That’s about $55 billion more than Microsoft Corp. co-founder Bill Gates, the world’s second-richest person.

Answer: B) More intense effects Explanation: Combining drugs usually leads to more intense effects on our health.