<ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, th...
<ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, th...
<ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, th...
<ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, th...
<ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, th...
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Utm1

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Utm1

  1. 1. <ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, the new ratio of the number of men to the number of women became 1:2. How many men were there at first? </li></ul>5u 7u 1 After Change Before Women Men
  2. 2. <ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, the new ratio of the number of men to the number of women became 1:2. How many men were there at first? </li></ul>5u 7u -60 1 After Change Before Women Men 2
  3. 3. <ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, the new ratio of the number of men to the number of women became 1:2. How many men were there at first? </li></ul>5u 7u -60 1p 2p 1 After Change Before Women Men 2 3
  4. 4. <ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, the new ratio of the number of men to the number of women became 1:2. How many men were there at first? </li></ul>5u 7u -60 1p 2p X 2 X 2 X 7 =7u =10u X 7 =14u =14u 1 After Change Before Women Men 2 3 4
  5. 5. <ul><li>At a gathering, the ratio of the number of men to the number of women was 5:7. After 60 men left the gathering, the new ratio of the number of men to the number of women became 1:2. How many men were there at first? </li></ul>5u 7u -60 1p 2p X 2 X 2 X 7 =7u =10u X 7 =14u =14u 10u – 7u  60 3u  60 1u  60 ÷ 3 = 20 10u  20 x 10 = 200 Ans: 200 men 1 After Change Before Women Men 2 3 4 5

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