7b. you bought 10 shares of stock in streamingvideoco for $45 per share. two months later you sold the 10…

7b. you bought 10 shares of stock in streamingvideoco for $45 per share. two months later you sold the 10 shares of stock for $80 per share. what was your profit or loss on streamingvideoco stock? assume that streamingvideoco didnt pay a dividend and that you didnt incur any trading fees during that period.\nloss of $800\ngain of $350\nloss of $450\ngain of $800\n\n7c. which of the following investment choices best reflects a diversified portfolio?\ninvesting in one large - cap restaurant stock\ninvesting in a mutual fund that invests in 30 to 40 oil and gas companies\ninvesting in an s&p 500 index fund\ninvesting in 10 to 20 companies in the technology industry\n\n8a. what is cognitive bias?\na logical strategy humans use to come to a decision that is in their best interest\nan argument that is based on fact, usually backed up by scientific evidence\na theoretical - based approach to solving problems that most humans face\na systematic error in thinking that can influence humans’ decisions and judgements

7b. you bought 10 shares of stock in streamingvideoco for $45 per share. two months later you sold the 10 shares of stock for $80 per share. what was your profit or loss on streamingvideoco stock? assume that streamingvideoco didnt pay a dividend and that you didnt incur any trading fees during that period.\nloss of $800\ngain of $350\nloss of $450\ngain of $800\n\n7c. which of the following investment choices best reflects a diversified portfolio?\ninvesting in one large - cap restaurant stock\ninvesting in a mutual fund that invests in 30 to 40 oil and gas companies\ninvesting in an s&p 500 index fund\ninvesting in 10 to 20 companies in the technology industry\n\n8a. what is cognitive bias?\na logical strategy humans use to come to a decision that is in their best interest\nan argument that is based on fact, usually backed up by scientific evidence\na theoretical - based approach to solving problems that most humans face\na systematic error in thinking that can influence humans’ decisions and judgements

Answer

Explanation:

7B - Step1: Calculate total cost

The cost of buying 10 shares at $45 per share is $45\times10 = 450$.

7B - Step2: Calculate total selling - price

The selling - price of 10 shares at $80 per share is $80\times10=800$.

7B - Step3: Calculate profit

Profit = Selling price - Cost price. So, profit = $800 - 450=350$.

7C - Explanation

A diversified portfolio spreads risk across different asset classes, industries, and market capitalizations. The S&P 500 index fund invests in 500 large - cap companies across various industries, providing broad market exposure. Investing in one large - cap restaurant stock is concentrated in one industry. Investing in a mutual fund that invests in 30 to 40 oil and gas companies is concentrated in the energy sector. Investing in 10 to 20 companies in the technology industry is concentrated in the technology sector.

8A - Explanation

Cognitive bias is a systematic error in thinking that can influence humans' decisions and judgments. It is not a logical strategy for making decisions in one's best interest, nor is it an argument based on fact or a theoretical - based approach to solving problems.

Answer:

7B. Gain of $350 7C. Investing in an S&P 500 index fund 8A. A systematic error in thinking that can influence humans’ decisions and judgements